STA 111 CBT PRACTICE

1. The class interval of the groups is

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

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

4. 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.

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

6. In a symmetrical distribution, if Q1=3 and Q3=9, the median is:

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

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

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

10. 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:

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

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

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

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

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

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

17. The harmonic mean of the set {1,2,3,4,5,6,7,8,9,10} is:

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

19. The mean of data x:3,2,3,4,5,6 with frequencies f:2,8,24,52,31,11 is

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

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

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

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

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

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

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

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

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

29. 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

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

31. Another name for the cumulative frequency curve is:

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

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

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

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

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

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

38. A measure of location is:

39. An example of a discrete variable is:

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