Free IMSA Statistical Analysis Questions and Answers

Question 1

What is the mean of the following set of numbers: 4, 8, 15, 16, 23, 42?

Accepted Answer

19

Answer

18

Answer

20

Answer

21

Question 2

What is the median of the following set of numbers: 7, 3, 9, 12, 15?

Accepted Answer

9

Answer

7

Answer

12

Answer

15

Question 3

Which of the following measures of central tendency is most affected by outliers?

Accepted Answer

Mean

Answer

Median

Answer

Mode

Answer

Range

Question 4

What is the mode of the following set of numbers: 2, 4, 4, 4, 6, 7, 8, 9?

Accepted Answer

4

Answer

2

Answer

6

Answer

7

Question 5

Which of the following is a measure of variability?

Accepted Answer

Standard Deviation

Answer

Median

Answer

Mean

Answer

Mode

Question 6

If a dataset has a mean of 50 and a standard deviation of 5, what is the z-score of a data point that is 60?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 7

In a normal distribution, what percentage of data falls within one standard deviation of the mean?

Accepted Answer

68%

Answer

50%

Answer

95%

Answer

99%

Question 8

What is the interquartile range (IQR) of the following dataset: 1, 3, 7, 9, 12, 15, 18, 20?

Accepted Answer

8

Answer

6

Answer

7

Answer

9

Question 9

What type of correlation exists if an increase in one variable corresponds to an increase in another variable?

Accepted Answer

Positive correlation

Answer

Negative correlation

Answer

No correlation

Answer

Zero correlation

Question 10

Which graphical representation is best used to show the distribution of a data set?

Accepted Answer

Histogram

Answer

Bar Chart

Answer

Pie Chart

Answer

Line Graph