BUS 204 Week 3 Quiz 3

BUS 204 Week  3  Quiz 3 | MiraCosta College

Question 1

If a business manager selected a sample of customers and computed the mean income for this sample of customers, she has computed:

a parameter.  

a nominal value.  

a statistic.    

an ordinal value.

Question 2

A large retail company gives an employment screening test to all prospective employees. Franklin Gilman recently took the test and it was reported back to him that his score placed him at the 80th percentile. Therefore:

Franklin was in the bottom 20 percent of those that have taken the test.  

Franklin's score has a z-score of 80. 

Franklin scored as high or higher than 80 percent of the people who took the test.    

80 people who took the test scored below Franklin.

Question 3

The most frequently used measure of central tendency is:  

mode.  

middle value.  

median.  

mean.  

Question 4

Which of the following is the most frequently used measure of variation?

The standard deviation    

The mode

The variance  

The range

Question 5

In order to compute the mean and standard deviation, the level of data measurement should be:  

ordinal.  

nominal.  

ratio or interval.    

qualitative.

Question 6

When comparing data measured by substantially different scales, we must use:

standardized data variations.  

standardized data scores.  

standardized data scales.  

standardized data values.

Question 7

The Empirical Rule states that for a bell-shaped distribution, approximately 95 percent of data should lie within:

two standard deviations from either side of the mean.    

one standard deviation from either side of the mean.  

three standard deviations from either side of the mean.  

four standard deviations from either side of the mean.

Question 8

The symbol μ is used to represent the sample mean.

True  

False