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 TMA 103 exam

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

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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STA 111

1 / 40

1. The nine points of a distribution that divide it into ten equal parts are called:

A. Decimals

B. Percentiles

C. Quartiles

D. Deciles

2 / 40

2. The scientific method for collecting, organizing, summarizing, presenting, and analyzing data is:

A. Equations

B. Mathematics

C. Experiments

D. Statistics

3 / 40

3. Variables that take infinite values between two fixed points are called:

A. Ordinal

B. Quantitative

C. Discrete

D. Continuous

4 / 40

4. An example of a discrete variable is:

A. The number of new babies in a maternity ward

B. The production capacity of a machine

C. Masses in kg of patients in a hospital

D. Measuring liters of palm oil in a drum

5 / 40

5. The harmonic mean of the set is:

A. 2.929

B. 5.5

C. 0.2929

D. 3.414

6 / 40

6. Copy - A fractional part of an entire population is referred to as:

A. Group

B. Category

C. Selection

D. Sample

7 / 40

7. Obtain the value of $x$ if the arithmetic mean of $2, 5 + x, x - 3, 13, 21$ is 14:

A. 13

B. 14

C. 11

D. 12

8 / 40

8. Stem-and-leaf is a quick way to find the ... and ... of a distribution:

A. Mean and Median

B. Mean and Mode

C. Median and Mode

D. Median and Skewness

9 / 40

9. Data that are used for the specific purpose for which they are collected are called:

A. Secondary Data

B. Primary Data

C. Tertiary Data

D. Nursery Data

10 / 40

10. The range of a set of data is obtained by calculating the value of:

A. Highest Value × Lowest Value

B. Highest Value + Lowest Value

C. Highest Value - Lowest Value

D. Highest Value / Lowest Value

11 / 40

11. The Mathematica command for calculating the mean of data 130, 84, 142, 127, 125, 97 is:

A. Mean[{130,84,142,127,125,97}]

B. Mean{130,84,142,127,125,97}//

C. Mean[{130},{84},{142},{127},{125},{97}]

D. Mean{130,84,142,127,125,97}//

12 / 40

12. Copy - The nine points of a distribution that divide it into ten equal parts are called:

A. Percentiles

B. Quartiles

C. Decimals

D. Deciles

13 / 40

13. The class size of the class "16-18" is:

A. 17

B. 3

C. 120

D. 2

14 / 40

14. Copy - ...can be defined as the number of times a variable occurs:

A. Mode

B. Mean

C. Median

D. Frequency

15 / 40

15. A fractional part of an entire population is referred to as:

A. Sample

B. Group

C. Category

D. Selection

16 / 40

16. If the average of 4 children is 15 years and their parents' ages are added, making the average 25 years, the father's age (4 years older than the mother) is:

A. 48

B. 43

C. 42

D. 47

17 / 40

17. If the mean of -1, 0, 9, 3, K, and 5 is 2, where K is a constant, obtain the median of the set of numbers

A. 3/2

B. 6

C. Impossible

D. 1

18 / 40

18. Find the mean age from the following distribution (in millions): Age: 0-9, 10-19, 20-29, ..., with frequencies 10.1, 9.3, 7.9, etc.

A. 34.55

B. 59.31

C. 56.80

D. 30.56

19 / 40

19. The lower and upper class limits of the class "16-18" is:

A. 16.5 and 18.5

B. 15.5 and 18.5

C. 15.5 and 17.5

D. 16 and 18

20 / 40

20. The class mark of the class "16-18" is:

A. 16

B. 34

C. 17

D. 18

21 / 40

21. In a symmetrical distribution, if and , the median is:

A. 12

B. 3

C. 6

D. 9

22 / 40

22. Calculate the standard deviation of the data set (1001, 1003, 1005, 1007, 1009):

A. 2√8

B. 3√8

C. 8

D. 2√2

23 / 40

23. ...can be defined as the number of times a variable occurs:

A. Frequency

B. Mean

C. Mode

D. Median

24 / 40

24. The lower and upper values of classes that mark common points between classes are called:

A. Class Limits

B. Class Marks

C. Class Intervals

D. Class Boundaries

25 / 40

25. For a good questionnaire, the questions must not be:

A. Short and Direct

B. Consistent

C. Unbiased

D. Complex Calculations

26 / 40

26. The semi-interquartile range of the grouped data is:

A. 15

B. 7.5

C. -7.5

D. -15

27 / 40

27. data grouped as 20-29, 30-39, 40-49, and 50-59 with frequencies 18, 34, 58, and 48, respectively. The interquartile range is:

A. 5

B. -5

C. 15

D. -15

28 / 40

28. ...have each bar representing a class split up into its constituent parts.

A. Component Bar Chart

B. Split Bar Chart

C. Simple Bar Chart

D. Multiple Bar Chart

29 / 40

29. The mean length of 10 iron rods (e.g., 12, 13, ..., 15√ $2$ , 14√ $2$ ) is

A. 14.5

B. 15.2

C. 12.5

D. 13.5

30 / 40

30. A measure of location is:

A. Mode

B. Mean Deviation

C. Moment

D. Variance

31 / 40

31. The mean of data with frequencies

A. 3.5

B. 40.6

C. 4.50

D. 4.06

32 / 40

32. Statistical data can be classified into the following except:

A. Discrete and Continuous

B. Primary and Secondary

C. Descriptive and Deductive

D. Time Series and Cross Sectional

33 / 40

33. The sum of the angles of a pie chart corresponding to Sociology and Accounting (140 and 130 students) in a class of 300 is:

A. 120°

B. 220°

C. 100°

D. 80°

34 / 40

34. The class interval of the groups is

A. 4

B. 5

C. 3

D. 2

35 / 40

35. The median age of 10 children (12, 13, ..., 16, 14) is:

A. 14.5

B. 12.5

C. 15.5

D. 13.5

36 / 40

36. Find the standard deviation of the data set 7, 47, 8, 42, 47, 95, 42, 96, 3:

A. 32.09

B. 31.09

C. 30.09

D. 29.09

37 / 40

37. The range of the data set (20-29, 30-39, ...) is:

A. 38

B. 40

C. 39

D. 35

38 / 40

38. The range of the data set (5, 4, 4, 3, 3, 3, 3) is:

A. 2

B. 4

C. 7

D. 3

39 / 40

39. Data designed with involvement in the design phase is:

A. Primary Data

B. Discrete Data

C. Secondary Data

D. Quantitative Data

40 / 40

40. Another name for the cumulative frequency curve is:

A. Ogive

B. Frequency Polygon

C. Line Graph

D. Quadratic Curve

Your score is

The average score is 36%

STA 111 CBT PRACTICE

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