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

A. Selection

B. Category

C. Sample

D. Group

2 / 40

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

A. 15.5

B. 12.5

C. 13.5

D. 14.5

3 / 40

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

A. 3

B. 6

C. 12

D. 9

4 / 40

4. The mean of data with frequencies

A. 4.06

B. 4.50

C. 3.5

D. 40.6

5 / 40

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

A. -7.5

B. -15

C. 7.5

D. 15

6 / 40

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

A. Primary Data

B. Quantitative Data

C. Discrete Data

D. Secondary Data

7 / 40

7. 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}//

8 / 40

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

A. Mean and Mode

B. Mean and Median

C. Median and Skewness

D. Median and Mode

9 / 40

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

A. 18

B. 16

C. 17

D. 34

10 / 40

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

A. 7

B. 4

C. 3

D. 2

11 / 40

11. 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. 1

B. 6

C. Impossible

D. 3/2

12 / 40

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

A. Quartiles

B. Deciles

C. Decimals

D. Percentiles

13 / 40

13. 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

14 / 40

14. 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. 59.31

B. 30.56

C. 34.55

D. 56.80

15 / 40

15. 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. 43

B. 42

C. 48

D. 47

16 / 40

16. 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. -15

B. 5

C. 15

D. -5

17 / 40

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

A. Quantitative

B. Ordinal

C. Discrete

D. Continuous

18 / 40

18. An example of a discrete variable is:

A. The production capacity of a machine

B. Measuring liters of palm oil in a drum

C. The number of new babies in a maternity ward

D. Masses in kg of patients in a hospital

19 / 40

19. The harmonic mean of the set is:

A. 2.929

B. 5.5

C. 3.414

D. 0.2929

20 / 40

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

A. Descriptive and Deductive

B. Primary and Secondary

C. Time Series and Cross Sectional

D. Discrete and Continuous

21 / 40

21. A measure of location is:

A. Mean Deviation

B. Variance

C. Moment

D. Mode

22 / 40

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

A. Mode

B. Mean

C. Frequency

D. Median

23 / 40

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

A. 3√8

B. 8

C. 2√8

D. 2√2

24 / 40

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

A. Experiments

B. Statistics

C. Equations

D. Mathematics

25 / 40

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

A. Class Limits

B. Class Boundaries

C. Class Marks

D. Class Intervals

26 / 40

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

A. 35

B. 39

C. 40

D. 38

27 / 40

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

A. 15.2

B. 13.5

C. 14.5

D. 12.5

28 / 40

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

A. Component Bar Chart

B. Simple Bar Chart

C. Multiple Bar Chart

D. Split Bar Chart

29 / 40

29. The class interval of the groups is

A. 4

B. 3

C. 5

D. 2

30 / 40

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

A. Median

B. Mean

C. Frequency

D. Mode

31 / 40

31. Another name for the cumulative frequency curve is:

A. Ogive

B. Line Graph

C. Frequency Polygon

D. Quadratic Curve

32 / 40

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

A. 31.09

B. 29.09

C. 32.09

D. 30.09

33 / 40

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

A. 15.5 and 18.5

B. 15.5 and 17.5

C. 16.5 and 18.5

D. 16 and 18

34 / 40

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

A. Secondary Data

B. Tertiary Data

C. Nursery Data

D. Primary Data

35 / 40

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

A. 13

B. 14

C. 12

D. 11

36 / 40

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

A. 120

B. 3

C. 17

D. 2

37 / 40

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

A. Percentiles

B. Decimals

C. Quartiles

D. Deciles

38 / 40

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

A. Category

B. Sample

C. Group

D. Selection

39 / 40

39. 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. 100°

B. 80°

C. 220°

D. 120°

40 / 40

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

A. Unbiased

B. Complex Calculations

C. Short and Direct

D. Consistent

Your score is

The average score is 36%

STA 111 CBT PRACTICE

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