STT205

Category: STT205

ATTENTION:

Kindly note that you will be presented with 50 questions randomized from the NOUN question bank. Make sure to take the quiz multiple times so you can get familiar with the questions and answers, as new questions are randomized in each attempt.

Good luck!

STT205

1 / 50

1. An impossible event has the probability ______

A. 0.5

B. 0

C. 0.25

D. 1

2 / 50

2. ____ is not an axiom of probability

A. \[P(\Omega)= 1\]

B. \[P(E)\leq 0\]

C. \[P(\Omega)= 0\]

D. \[P(E)\leq 1\]

3 / 50

3. Suppose there are 70 students in an examination with the students writing at least one of the subjects; Chemistry, Physics and Biology. Thirty(30) students offer Physics, 33 offer Chemistry and 40 offer biology, 10 students offer both Physics and Chemistry. Fourteen (14) of the students offer Physics and Biology, and 15 of them offer Biology and Chemistry. Find the number of students that offer all subjects

A. 6

B. 7

C. 8

D. 11

4 / 50

When the values in a series are not of equal importance, we calculate the: _____________

5 / 50

5. ____ statistics deals with methods of organizing, summarizing and presenting data in an informative way

A. Descriptive

B. Frequency

C. Inferential

D. Inductive

6 / 50

Step deviation method or coding method is used for computation of the______

7 / 50

The total of all the observations divided by the number of observations is called: ______

8 / 50

Ten families have an average of 2 boys. How many boys do they have together?

9 / 50

 The first step in calculating the median of a discrete variable is to determine the: _______

10 / 50

10.

The arithmetic mean is highly affected by: ________

11 / 50

11.

The midpoint of the values after they have been ordered from the smallest to the largest or the largest to the smallest is called:____

12 / 50

12.

The sum of deviations is zero when deviations are taken from:________

13 / 50

13. Any arrangement of r objects selected from a single group of n possible objects is called a ___________

A. combination

B. notation

C. factorial

D. permutation

14 / 50

14. The difference between the harmonic mean of 2, 4, 8 and their geometric mean is __________

A. 0.48

B. 0.67

C. 0.47

D. 0.57

15 / 50

15. The empirical relationship between the mean and median is given by; mean �?? mode = x(mean �?? median) in the table below . Then x is _________________

A. 4.0

B. 4.5

C. 1.0

D. 3.0

16 / 50

16.

The population mean Î¼ is an example of a: _________

17 / 50

17.

When all the values in a series occur the equal number of times, then it is not possible to calculate the:__________

18 / 50

18. What is the range of the set of data in the below

A. 6.5

B. 17

C. 6

D. 21

19 / 50

19.

The arithmetic mean of 10 items is 4 and the arithmetic mean of 5 items is 10. The combined arithmetic mean is: ______

20 / 50

20. Calculate the standard deviation of the set of data in the table below

A. 56.65

B. 51.56

C. 13.73

D. 56.51

21 / 50

21. A student scored 45% in MTH101, 62% in MTH102, 30% in BUS103, and 70% in ACC101. Find his GPA if the respective credits are 3, 2, 2, 3

A. 63%

B. 3.90

C. 3.10

D. 2.90

22 / 50

22.

Given X1=20 and X2=-20. The arithmetic mean will be: ________

23 / 50

23. What is the probability of not getting a 1 in the toss of a single die?

A. \[\frac{3}{5}\]

B. \[\frac{1}{6}\]

C. \[\frac{2}{3}\]

D. \[\frac{5}{6}\]

24 / 50

24. The addition rule of probability is used for ___ events

A. independent

B. mutually exclusive

C. dependent

D. mutually inclusive

25 / 50

25. There are 5 different items to be stocked in a store with 3 bins for the storage. What are the possible number of arrangements?

A. 36

B. 37

C. 60

D. 55

26 / 50

26.

Scores that differ greatly from the measures of central tendency are called:_________

27 / 50

27.

The suitable average for qualitative data is: ________

28 / 50

28.

The sum of the squares of the deviations about mean divided by the number of observations is: ________

29 / 50

29. A characteristics that assumes different values for different entities is called __________________

A. population

B. random

C. sample

D. variable

30 / 50

30. In an examination the score obtained is weighted 3 times as much as a test score. If a student scored 85% in the examination with a test score of 90%, what is his mean score

A. 0.937

B. 0.9

C. 0.8825

D. 0.8625

31 / 50

31. The square root of the sum of deviations of a set of numbers from their arithmetic mean is ___________

A. standard deviation

B. minimum

C. maximum

D. zero

32 / 50

32. What is the sum of the medians of {3, 4, 4, 5, 6, 8, 8, 10} and {5, 5, 7, 9, 11, 12, 15, 18}

A. 19.5

B. 25.5

C. 10.5

D. 15.5

33 / 50

33. 36. If 5, 8, 6 and 2 occur with frequencies 3, 2, 4 and 1 respectively, find the mean

A. 9.7

B. 5.7

C. 15.7

D. 5.75

34 / 50

34.

Sum of absolute deviations of the values is least when deviations are taken from: ________

35 / 50

35. ____ is not an advantage of secondary data

A. They are available on a wide range of subjects

B. They can be used to establish trends for forecasting

C. They are inexpensive to collect

D. They are the most appropriate for any statistical work

36 / 50

36.

 If the smallest observation in a data is decreased, the average which is not affected is: ____

37 / 50

37.

The mean of 10 observations is 10. All the observations are increased by 10%. The mean of increased observations will be: ______

38 / 50

38. A set of data with only one mode is said to be __________

A. singlemodal

B. uniquemodal

C. unicmodal

D. unimodal

39 / 50

39.

The sample mean X- is an example of a: ________________

40 / 50

40. Which of the following statement does not represent a role of statistics in the society?

A. Government uses statistics to measure the effect of external factors on its policies

B. Government uses statistics as a tool for collecting economic aggregates

C. Government uses statistics only for census

D. Businesses use statistics to monitor the national economy

41 / 50

41. Which of the following is not a source of data?

A. survey designs

B. Micro-statistical information

C. Statistical information in business

D. Macro-statistical information

42 / 50

42.

If the arithmetic mean of the two numbers X1 and X2 is 5 if X1=3, then X2 is:_________

43 / 50

43.

Any measure indicating the Centre of a set of data, arranged in an increasing or decreasing order of magnitude, is called a measure of: ______

44 / 50

44.

The median is considered a robust measure because it is resistant to: ________

45 / 50

45. The following are examples of discrete random variables except

A. Poisson Distribution

B. Binomial distribution

C. Bernoulli distribution

D. Normal Distribution

46 / 50

46. Which of these is closer to the mode for a skewed distribution?

A. mean

B. modal

C. median

D. skewness

47 / 50

47. The first step involved in constructing a group frequency distribution is to _________ (a) (b) count the number of items

A. distribute

B. count the number of items

C. determine the number of classes

D. tally

48 / 50

48. What is the cumulative frequency of 40 in table below?

A. \[\frac{9}{20}\]

B. 9

C. 7

D. 10

49 / 50

49. If at least one of the events of an experiment can occur, then they are said to be ________ events

A. mutually exclusive

B. collectively exhaustive

C. independent

D. dependent

50 / 50

50. What is the relative cumulative frequency of 50 in the table below

A. 16

B. \[\frac{4}{5}\]

C. 1

D. \[\frac{7}{20}\]

Rate this quiz