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Category: STT205

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STT205

1 / 50

The population mean μ is an example of a: _________


2 / 50

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


3 / 50

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


4 / 50

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

5 / 50

The following are examples of discrete random variables except

6 / 50

The elimination of extreme scores at the top of the set has the effect of:_________


7 / 50

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


8 / 50

What is the geometric mean of 3, 5, 6, and 7

9 / 50

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


10 / 50

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

11 / 50

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

12 / 50

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

13 / 50

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

14 / 50

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

15 / 50

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. How many students offer only Biology

16 / 50

The frequency distribution of the hourly wage rate of 60 employees of a paper mill is as follows: The mean wage rate is:N______
 

17 / 50

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}

18 / 50

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

19 / 50

Which of the following is not a source of data?

20 / 50

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

21 / 50

An impossible event has the probability ______

22 / 50

The sum of the frequencies of 16 and 18 in the table below is _____________

23 / 50

The sum of deviations taken from mean is: _______________

24 / 50

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

25 / 50

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

26 / 50

What effect will the elimination of extreme scores at the bottom of a data set have on the mean? ______  


27 / 50

Primary data is not collected through ___________

28 / 50

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

29 / 50

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

30 / 50

______ is not a measure of dispersion

31 / 50

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

32 / 50

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

33 / 50

The arithmetic mean is highly affected by: ________

34 / 50

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

35 / 50

Calculate 70% of the mean of the set of data in the table below

36 / 50

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

37 / 50

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

38 / 50

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


39 / 50

The sum of the squares of the deviations of the values of a variable is least when the deviations are measured from: ____________


40 / 50

_____ is the degree of peakness of a distribution

41 / 50

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

42 / 50

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

43 / 50

If ∑i=110Xi-50=100 then sample mean X- will be: ________


44 / 50

If the mode of the distribution is X the [frac{X}{2}] in the table below is _____________

45 / 50

What is the cumulative frequency of 40 in table below?

46 / 50

 If the arithmetic mean of 20 values is 10, then sum of these 20 values is:_____

47 / 50

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


48 / 50

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

49 / 50

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

50 / 50

____ is not an advantage of secondary data

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