Question 1

The number of Cambodian college students studying abroad has increased over the last 6 years from 21,000 to 54,000.What was the average annual growth rate over this period?

Accepted Answer

A) 13.82% 
B) 17.02% 
C) 14.56% 
D) 9.39% 
E) 22.8%

Question 2

In a sample of five trading days, the number of shares traded (in 1000s) for two particular stocks appears in the table.Compute the correlation coefficient appropriate here.

Accepted Answer

A) +1.25 
B) +.953 
C) +562 
D) +.771 
E) +.856

Question 3

In July 2013, the unemployment rate in California was 8.5%, that of Oregon was 7.9%, and that of Washington State was 6.8%.(Keep in mind that California is by far the most populous of the three states).If a simple, rather than weighted, average were used to estimate the overall unemployment rate across the three West coast states, the resulting value would be:

Accepted Answer

A) an underestimate of the true unemployment rate across the three states. 
B) an accurately estimate of the true unemployment rate across the three states. 
C) an overestimate of the true unemployment rate across the three states. 
D) the direction of the bias of the estimate cannot be determined. 
E) none of the above

Question 4

Below is the list of dividends on Bonneville Electric stock over the past 7 years: $.46, .61, .55, .76, .94, .68, .88
List the five values that would be necessary if you were to construct a box-and-whisker plot for the dividend data.

Accepted Answer

A) minimum = .46, Q1= .55, Q2 = .68, Q3 = .88, maximum = .94 
B) minimum = .46, Q1= .51, Q2 =.64, Q3 = .82, maximum = .94 
C) minimum = .46, Q1= .58, Q2 = .65, Q3 = .82, maximum = .94 
D) minimum = .46, Q1= .49, Q2 = .66, Q3 = .88, maximum = .94 
E) minimum = .46, Q1= .66, Q2 = .77, Q3 = .88, maximum = .94

Question 5

In computing the pth percentile, if the index i is NOT an integer, then round up to the next highest integer to get the pth percentile.

Accepted Answer

A) True 
 B)False

Question 6

A stem-and-leaf display is a graph of a cumulative distribution.

Accepted Answer

A) True 
 B)False

Question 7

The list below shows the number of orders processed by Grant and Traynor over the past 16 weeks.  Use the method described in the chapter to identify the value of the 65th percentile, then compare the % of the values in the data set that are ACTUALLY at or below the 65th percentile value you had determined.

Accepted Answer

A) The 65th percentile value is 472; the actual percent of the values at or below 472 is 75.00%. 
B) The 65th percentile value is 660; the actual percent of the values at or below 660 is 68.75%. 
C) The 65th percentile value is 660; the actual percent of the values at or below 660 is 37.5%. 
D) The 65th percentile value is 472; the actual percent of the values at or below 472 is 31.25%. 
E) The 65th percentile value is 531; the actual percent of the values at or below 472 is 65.00%.

Question 8

Below is a list of file sizes (in gigabytes) for 15 data files that Ron DiGregorio created for his updated customer records.Determine Q3.

Accepted Answer

A) 7.8 
B) 6.0 
C) 6.2 
D) 6.5 
E) 8.9

Exam 3: Descriptive Statistics II: Additional Descriptive Measures and Data Displays

The number of Cambodian college students studying abroad has increased over the last 6 years from 21,000 to 54,000.What was the average annual growth rate over this period?

In a sample of five trading days, the number of shares traded (in 1000s) for two particular stocks appears in the table.Compute the correlation coefficient appropriate here.

Below is the list of dividends on Bonneville Electric stock over the past 7 years: $.46, .61, .55, .76, .94, .68, .88 List the five values that would be necessary if you were to construct a box-and-whisker plot for the dividend data.

In computing the pth percentile, if the index i is NOT an integer, then round up to the next highest integer to get the pth percentile.

A stem-and-leaf display is a graph of a cumulative distribution.

Below is a list of file sizes (in gigabytes) for 15 data files that Ron DiGregorio created for his updated customer records.Determine Q3.