Question 1

Which of the following is another name for a normal distribution?

Accepted Answer

A)  mean 
B)  median 
C)  positive skew 
D)  negative skew

Question 2

Which of the following is calculated as 100% minus alpha?

Accepted Answer

A)  frequency 
B)  p-value 
C)  confidence level 
D)  confidence interval

Question 3

Which type of statistics helps researchers to estimate the effects of sampling errors on their results?

Accepted Answer

A)  univariate statistics 
B)  bivariate statistics 
C)  multivariate statistics 
D)  inferential statistics

Question 4

How is the range of a set of scores calculated?

Accepted Answer

A)  highest score minus the lowest score 
B)  highest score plus the lowest score 
C)  highest score divided by the lowest score 
D)  lowest score minus the highest score

Question 5

When reporting a percentage, it is a good idea to also report the underlying number of cases.

Accepted Answer

A) True 
 B)False

Question 6

Researchers convert values of Pearson r to the coefficient of determination to do which of the following?

Accepted Answer

A)  account for the margin of error 
B)  represent variables in terms of percentages 
C)  represent correlation in terms of percentages 
D)  plot results on a graph

Question 7

In most populations, income has what type of curve?

Accepted Answer

A)  normal curve 
B)  frequency polygon 
C)  positive skew 
D)  negative skew

Question 8

A Pearson product-moment correlation coefficient expresses what?

Accepted Answer

A)  a linear relationship between two variables 
B)  a linear relationship between three or more variables 
C)  an asynchronous relationship between two variables 
D)  any relationship between dependent variables

Exam 8: Analyzing Data: Understanding Statistics