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

A. Statistics

B. Equations

C. Mathematics

D. Experiments

2 / 40

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

A. Class Intervals

B. Class Limits

C. Class Boundaries

D. Class Marks

3 / 40

3. Another name for the cumulative frequency curve is:

A. Quadratic Curve

B. Line Graph

C. Frequency Polygon

D. Ogive

4 / 40

4. 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

5 / 40

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

A. 8

B. 2√8

C. 3√8

D. 2√2

6 / 40

6. The mean of data with frequencies

A. 4.50

B. 4.06

C. 3.5

D. 40.6

7 / 40

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

A. Short and Direct

B. Unbiased

C. Complex Calculations

D. Consistent

8 / 40

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

A. 15

B. 7.5

C. -15

D. -7.5

9 / 40

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

A. Nursery Data

B. Tertiary Data

C. Secondary Data

D. Primary Data

10 / 40

10. 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}//

11 / 40

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

A. 17

B. 2

C. 120

D. 3

12 / 40

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

A. 12

B. 6

C. 9

D. 3

13 / 40

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

A. 14

B. 12

C. 13

D. 11

14 / 40

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

A. Quantitative

B. Discrete

C. Ordinal

D. Continuous

15 / 40

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

A. 15.5 and 17.5

B. 16 and 18

C. 15.5 and 18.5

D. 16.5 and 18.5

16 / 40

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

A. Quartiles

B. Percentiles

C. Deciles

D. Decimals

17 / 40

17. 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. -15

C. 15

D. -5

18 / 40

18. A measure of location is:

A. Mean Deviation

B. Variance

C. Mode

D. Moment

19 / 40

19. The harmonic mean of the set is:

A. 5.5

B. 2.929

C. 0.2929

D. 3.414

20 / 40

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

A. 4

B. 2

C. 7

D. 3

21 / 40

21. 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. 42

C. 47

D. 43

22 / 40

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

A. Descriptive and Deductive

B. Discrete and Continuous

C. Time Series and Cross Sectional

D. Primary and Secondary

23 / 40

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

A. Mean and Mode

B. Median and Mode

C. Median and Skewness

D. Mean and Median

24 / 40

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

A. 14.5

B. 15.5

C. 12.5

D. 13.5

25 / 40

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

A. Median

B. Mode

C. Frequency

D. Mean

26 / 40

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

A. Category

B. Selection

C. Group

D. Sample

27 / 40

27. 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. 6

B. Impossible

C. 3/2

D. 1

28 / 40

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

A. Sample

B. Selection

C. Category

D. Group

29 / 40

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

A. Multiple Bar Chart

B. Component Bar Chart

C. Split Bar Chart

D. Simple Bar Chart

30 / 40

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

A. Percentiles

B. Quartiles

C. Decimals

D. Deciles

31 / 40

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

A. 17

B. 16

C. 18

D. 34

32 / 40

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

A. Frequency

B. Mean

C. Mode

D. Median

33 / 40

33. 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. 56.80

D. 34.55

34 / 40

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

A. 38

B. 35

C. 39

D. 40

35 / 40

35. 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. 80°

C. 220°

D. 100°

36 / 40

36. An example of a discrete variable is:

A. Masses in kg of patients in a hospital

B. The production capacity of a machine

C. Measuring liters of palm oil in a drum

D. The number of new babies in a maternity ward

37 / 40

37. The class interval of the groups is

A. 5

B. 2

C. 4

D. 3

38 / 40

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

A. 30.09

B. 31.09

C. 29.09

D. 32.09

39 / 40

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

A. 13.5

B. 14.5

C. 12.5

D. 15.2

40 / 40

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

A. Primary Data

B. Quantitative Data

C. Secondary Data

D. Discrete Data

Your score is

The average score is 36%

STA 111 CBT PRACTICE

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