MTH 234 CBT PRACTICE TEST

Ace/Undergragra 1 week ago

0 140 1 minute read

Take your time to read instructions before taking this test.

There are 40 questions which you are to answer in 15 minutes that gives you roughly 30 seconds per question.

If you can get at least 60%, you can be rest assured that you’ll ace MTH 234 exam

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In a normal exam you will be asked between 40 – 60 questions but I only arranged 40 questions

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Note

Do not be in a hurry to answer the questions

Do not waste time on a question you don’t know

Move as fast as possible and starting with questions that don’t have calculation first to save time

Always crosscheck

Don’t be in a hurry to submit, you are not in a competition

Don’t be scared. Getting an A is easy

Don’t be over confident, you can end up a D, E or F. Calm your blood, no be only you sabi book

Please do well to use our comment box incase there’s a message you want to pass to us

70 – 100 A

60 – 69 B

50 – 59 C

45 – 49 D

40 – 44 E

0 – 39 F

I wish you success

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MTH 234

1 / 40

The mean yield of yam following the fertilizer treatment from 10 plots was 176.1kg with standard deviation 3.88. What is the 95% confidence limit for the mean yield of the yam?

A. (162.42, 180.54)

B. (144.23, 179.77)

C. (152.35, 182.02)

D. (173.32, 178.88)

2 / 40

Adult males have normally distributed heights with mean equal to 70 inches and standard deviation equal to 3 inches, what percentage are between 68 and 73 in?

A. 0.5889

B. 0.3445

C. 0.6751

D. 0.4371

3 / 40

Weight measurement is conducted on new harvest of Watermelon, Thirty (n=30) randomly selected watermelon are carefully weigh and the weight recorded, the mean weight of the sample is 28.6g and the sample standard deviation is 2.2g. Estimate a 95% confidence interval for the mean weight in the whole watermelon harvest

A. (25.72, 31.24)

B. (25.61, 29.12)

C. (21.34, 28.41)

D. (27.81, 29.39)

4 / 40

In a poultry farming, the daily demand for water is normally distributed with a mean of 4000 litres and a standard deviation of 400 litres, if z-score of demand for a given day is 1.3. how many litres of water is the demand for the day?

A. 3650 litres

B. 4520 litres

C. 6650 litres

D. 5540 litres

5 / 40

If perpendiculars are erected at a distance of 1? from the mean and in both directions, the area covered by these perpendiculars and the curve will be

A. 0.6626

B. 0.6026

C. 0.6826

D. 1

6 / 40

Which of the following is not true about a binomial distribution

A. The outcome in each trial can be classified as true or false

B. In each of the trials the probability of failure must remain constant

C. The total number of trials must be known

D. The outcome of a new trial can depend on the trial of the previous

7 / 40

4 Mangoes , 3 Apples and 2 guavas. If 4 fruits are drawn at random, determine the probability that 1 of each fruit is drawn

A. 0.33

B. 0.42

C. 0.23

D. 0.12

8 / 40

For a certain breed of monkey in a zoo, the time to start eating when food is supply is normally distributed with mean 1.25 min and standard deviation of 0.46 min. what is the probability that the time to start eating is between 1 min and 1.75min

A. 0.3156

B. 0.2135

C. 1.8156

D. 0.5675

9 / 40

When do we have a negative correlation?

A. when an increase in one variable is associated to a greater or lesser extent with an increase in the other

B. when a change in one variable is to a small extent matched by a change in the other.

C. when the two variables are not in matched at all, and there is no relationship between changes in one variable and changes in the other.

D. when an increase in one variable is associated to a greater or lesser extent with a decrease in the other.

10 / 40

10.

The seven pairs of values (x, y) below shows the number of absences, x, in a BIO206 tutorial at Abuja study centre and the final exam grade, y, for 7 students. Find the equation of regression between x and y (1, 95), (0 , 90), (2,90), (6 ,55 ), (4, 70), (3 ,80), (3,85)

A. y = -7.12x+12.38

B. y = -2.55x - 6.23

C. y = 3.56x - 9.57

D. y = -6.55x+98.49

11 / 40

11.

A binomial experiment is a probability experiment that satisfies the following requirements except

A. The probability of a success must remain the same for each trial

B. There must be random number of trials

C. The outcomes of each trial must be independent of each other.

D. There must be a fixed number of trials

12 / 40

12.

if Ho:U = 260.50kg with standard deviation at 7.2 and 99% confidence limit, and H1:u > 260.50kg, what will be the final conclusion for Ho?

A. Accept H1

B. Reject H0

C. Indecision

D. Accept Ho

13 / 40

13.

Given a sample size and standard deviation as n=144 and s=24 respectively, find the population standard deviation___________

A. 2

B. 8

C. 6

D. 4

14 / 40

14.

A biologist discover that the proportion of 5 micro organisms in pond are V=24, W=36, X=15,Y=27, Z=38, determine the relative frequency of organism X

A. 25.22

B. 15.23

C. 8.23

D. 10.71

15 / 40

15.

In measuring the height of some rabbit, the mean was 76, and the standard deviation was 6, calculate the standard height of rabbits having a height of 112

A. 15

B. 8

C. 10

D. 6

16 / 40

16.

Which of the following is not an experimentation principle?

A. Randomization

B. Homogeneity

C. Replication

D. Diversion

17 / 40

17.

Table of Contents

Statistics that deals with using a conclusion deduce from a smaller sample to make conclusion on the entire larger population is defined as

A. Explanatory

B. Sampling

C. Descriptive

D. Inferential

18 / 40

18.

Before applying a statistics in a research, which of the following statement is incorrect in what a researcher needs to know?

A. Statistical significance test for comparing one set of data with another

B. Un-clarification of what to be achieved

C. What technique to use for an investigation

D. Rules of using the technique, using correctly the statistical techniques for analysis of biological data

19 / 40

19.

Which of the following is not an experimentation principle?

A. Diversion

B. Homogeneity

C. Randomization

D. Replication

20 / 40

20.

If the probability of a defective syringe is 2/3. find the standard deviation for the distribution of defective syringes in a total of 729

A. 20.56

B. 12.73

C. 25.63

D. 15.2

21 / 40

21.

The usage of statistical tools to analyze data obtain from the fields of biological sciences like Medicine, Pharmacy, Biochemistry, Microbiology, Agricultural Sciences is termed

A. Ethnostatistics

B. Pharmastatistics

C. Agrostatistics

D. Biostatistics

22 / 40

22.

Evaluate P(-0.38 <=z <=1.25)

A. 0.2195

B. 0.4523

C. 0.3512

D. 0.5424

23 / 40

23.

Which of these will you use to check if an experimental data is an approximate fit to a normal distribution?

A. Large samples

B. Small samples

C. Normal curve

D. Equal number of samples

24 / 40

24.

Given a sample size and standard deviation as n=144 and s=24 respectively, find the population standard deviation___________

A. 2

B. 8

C. 6

D. 4

25 / 40

25.

One of the following is not a Non parametric test

A. Sign Test

B. Normality Test

C. Spearman Rank Correlation

D. Krustal Wallis

26 / 40

26.

Which of the following is not a property of a Normal Curve

A. The mean, mode and median all coincide, thereby dividing the curve into two equal parts

B. No kurtosis or skewness in the curve

C. It is a bimodal symmetrical curve

D. Most items on the curve are clustered around the mean

27 / 40

27.

Which of the following is not true about a normal distribution curve?

A. It is a unimodal symmetrical curve

B. No kurtosis or skewness in the curve

C. Most items on the curve are clustered around the variance

D. The mean and median are equal

28 / 40

28.

The seven pairs of values (x, y) below shows the number of absences, x, in a BIO206 tutorial at Abuja study centre and the final exam grade, y, for 7 students. Find the correlation coefficient between x and y (1, 95), (0 , 90), (2,90), (6 ,55 ), (4, 70), (3 ,80), (3,85)

A. r = -0.56

B. r = 0.75

C. r = 0.82

D. r = -0.93

29 / 40

29.

In an experiment, the class with is 9, how many classes can be formed if the range of the set of data is 270.

A. 30

B. 20

C. 45

D. 42

30 / 40

30.

Find the probability that seven of 10 persons will recover from a tropical disease if we can assume independence and the probability is 0.80 that any one of them will recover from the disease

A. 0.2

B. 0.39

C. 0.45

D. 0.12

31 / 40

31.

The average number of customers arriving on any one day at poultry farming is 12, what is the probability that on a given day fewer than 9 customers will arrive at the farm?

A. 1.4

B. 0.72

C. 0.16

D. 0.13

32 / 40

32.

Which of the following is true of the projection of two vectors X and Y?

A. The projection of X on Y equal the scalar product of X.y where y is a unit vector in the direction of Y

B. The projection of X on Y equal the scalar product of Y.x where x is a unit vector in the direction of X

C. The projection of X on Y equal the scalar product of X.y where y is a unit vector in the opp direction of Y.

D. The projection of X on Y equal the scalar product of Y.x where x is a vector perpendicular to X

33 / 40

33.

An aspect of biostatistics that describe how to collect, organize, summarize and analyze data such that valid and objective conclusions or decision about the population can be drawn is called

A. ANOVA

B. Poisson

C. Experimental Design

D. Normality

34 / 40

34.

Find the probability that seven of 10 persons will recover from a tropical disease if we can assume independence and the probability is 0.80 that any one of them will recover from the disease

A. 0.2

B. 0.45

C. 0.39

D. 0.12

35 / 40

35.

Which of the following is not a reasons for constructing a frequency distribution?

A. To enable the reader to determine the nature and shape of the distribution

B. To enable the researcher to draw charts and graphs for the presentation of data

C. To un-facilitate computational procedures for measures of average and spread

D. To organize the data in a meaningful, intelligible way.

36 / 40

36.

If a normal distribution has u=30 and sd(a)= 5, what is the 6th percentile of the distribution?

A. 10.984

B. 30.301

C. 15.264

D. 22.225

37 / 40

37.

The average number of customers arriving on any one day at poultry farming is 12, what is the probability that on a given day fewer than 9 customers will arrive at the farm?

A. 1.4

B. 0.13

C. 0.72

D. 0.16

38 / 40

38.

The mean yield of yam following the fertilizer treatment from 10 plots was 176.1kg with standard deviation 3.88. What is the 95% confidence limit for the mean yield of the yam?

A. (152.35, 182.02)

B. (162.42, 180.54)

C. (173.32, 178.88)

D. (144.23, 179.77)

39 / 40

39.

Ten percent of the tools produced in a certain manufacturing process turn out to be defective. Find the probability that in a sample of 10 tools chosen at random exactly 2 will be defective by using poisson approximation to binomial distribution

A. 0.62

B. 0.18

C. 0.74

D. 0.580

40 / 40

40.

The width of the termite house is normally distributed with mean 3cm and standard deviation 0.14. what width value separates the widest 10% of all such house from the other 90%?

A. 0.632

B. 3.179

C. 1.651

D. 4.233

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The average score is 15%

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Ace/Undergragra 1 week ago

0 140 1 minute read

The mean yield of yam following the fertilizer treatment from 10 plots was 176.1kg with standard deviation 3.88. What is the 95% confidence limit for the mean yield of the yam?

Adult males have normally distributed heights with mean equal to 70 inches and standard deviation equal to 3 inches, what percentage are between 68 and 73 in?

In a poultry farming, the daily demand for water is normally distributed with a mean of 4000 litres and a standard deviation of 400 litres, if z-score of demand for a given day is 1.3. how many litres of water is the demand for the day?

If perpendiculars are erected at a distance of 1? from the mean and in both directions, the area covered by these perpendiculars and the curve will be

Which of the following is not true about a binomial distribution

4 Mangoes , 3 Apples and 2 guavas. If 4 fruits are drawn at random, determine the probability that 1 of each fruit is drawn

For a certain breed of monkey in a zoo, the time to start eating when food is supply is normally distributed with mean 1.25 min and standard deviation of 0.46 min. what is the probability that the time to start eating is between 1 min and 1.75min

When do we have a negative correlation?

The seven pairs of values (x, y) below shows the number of absences, x, in a BIO206 tutorial at Abuja study centre and the final exam grade, y, for 7 students. Find the equation of regression between x and y (1, 95), (0 , 90), (2,90), (6 ,55 ), (4, 70), (3 ,80), (3,85)

A binomial experiment is a probability experiment that satisfies the following requirements except

if Ho:U = 260.50kg with standard deviation at 7.2 and 99% confidence limit, and H1:u > 260.50kg, what will be the final conclusion for Ho?

Given a sample size and standard deviation as n=144 and s=24 respectively, find the population standard deviation___________

A biologist discover that the proportion of 5 micro organisms in pond are V=24, W=36, X=15,Y=27, Z=38, determine the relative frequency of organism X

In measuring the height of some rabbit, the mean was 76, and the standard deviation was 6, calculate the standard height of rabbits having a height of 112

Which of the following is not an experimentation principle?

Statistics that deals with using a conclusion deduce from a smaller sample to make conclusion on the entire larger population is defined as

Before applying a statistics in a research, which of the following statement is incorrect in what a researcher needs to know?

Which of the following is not an experimentation principle?

If the probability of a defective syringe is 2/3. find the standard deviation for the distribution of defective syringes in a total of 729

The usage of statistical tools to analyze data obtain from the fields of biological sciences like Medicine, Pharmacy, Biochemistry, Microbiology, Agricultural Sciences is termed

Evaluate P(-0.38 <=z <=1.25)

Which of these will you use to check if an experimental data is an approximate fit to a normal distribution?

Given a sample size and standard deviation as n=144 and s=24 respectively, find the population standard deviation___________

One of the following is not a Non parametric test

Which of the following is not a property of a Normal Curve

Which of the following is not true about a normal distribution curve?

The seven pairs of values (x, y) below shows the number of absences, x, in a BIO206 tutorial at Abuja study centre and the final exam grade, y, for 7 students. Find the correlation coefficient between x and y (1, 95), (0 , 90), (2,90), (6 ,55 ), (4, 70), (3 ,80), (3,85)

In an experiment, the class with is 9, how many classes can be formed if the range of the set of data is 270.

Find the probability that seven of 10 persons will recover from a tropical disease if we can assume independence and the probability is 0.80 that any one of them will recover from the disease

The average number of customers arriving on any one day at poultry farming is 12, what is the probability that on a given day fewer than 9 customers will arrive at the farm?

Which of the following is true of the projection of two vectors X and Y?

An aspect of biostatistics that describe how to collect, organize, summarize and analyze data such that valid and objective conclusions or decision about the population can be drawn is called

Find the probability that seven of 10 persons will recover from a tropical disease if we can assume independence and the probability is 0.80 that any one of them will recover from the disease

Which of the following is not a reasons for constructing a frequency distribution?

If a normal distribution has u=30 and sd(a)= 5, what is the 6th percentile of the distribution?

The average number of customers arriving on any one day at poultry farming is 12, what is the probability that on a given day fewer than 9 customers will arrive at the farm?

The mean yield of yam following the fertilizer treatment from 10 plots was 176.1kg with standard deviation 3.88. What is the 95% confidence limit for the mean yield of the yam?

Ten percent of the tools produced in a certain manufacturing process turn out to be defective. Find the probability that in a sample of 10 tools chosen at random exactly 2 will be defective by using poisson approximation to binomial distribution

The width of the termite house is normally distributed with mean 3cm and standard deviation 0.14. what width value separates the widest 10% of all such house from the other 90%?

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