Question 6 of 20
1.0/ 1.0 Points
The following data represents the grades in a statistics course. Below is the frequency
distribution and histogram.

Class Limit
Class Midpoint
Frequency
Relative Frequency
40 – 49.9
45
2
0.08
50 – 59.9
55
1
0.04
60 – 69.9
65
7
0.28
70 – 79.9
75
6
0.24
80 – 89.9
85
7
0.28
90 – 99.9
95
2
0.04
How many students were in the class?

75
D. 7
E.
95
Answer Key: A
Feedback: 2+1+7+6+7+2
Question 7 of 20
1.0/ 1.0 Points
A histogram that is positively skewed is also called

Part 4 of 8 - Measures of Central Tendency Questions
3.0/ 4.0 Points
Question 8 of 20
1.0/ 1.0 Points
The following histogram shows the number of enrollment in 40 community colleges. The shape
of this distribution is:

C.
right skewed (skewed positive)
Answer Key: C
Question 9 of 20
0.0/ 1.0 Points
A sample of 8 cats found the following weights in kg. What is the median weight?
See Attached Excel for Data.
cat weight data.xlsx
8 KB
A.
3.7125 kg
B.
3.7 kg
C.
3.9 kg

D.
3.6875 kg
Answer Key: B
Feedback: use =MEDIAN function in Excel
Question 10 of 20
1.0/ 1.0 Points
boat length data.xlsx
8 KB
The following data show the lengths of boats moored in a marina. The data are ordered from
smallest to largest.
See Attached Excel for Data.
Calculate the mean. Round your answer to one decimal place.

Feedback: =AVERAGE function in Excel
Question 11 of 20
1.0/ 1.0 Points
A sample of 8 cats found the following weights in kg. What is the mean weight? Do not round
your answer.
See Attached Excel for the Data.
cat weight data.xlsx
8 KB

Feedback: use =AVERAGE function in Excel
Part 5 of 8 - Measures of the Location of Data Questions
3.0/ 3.0 Points
Question 12 of 20
1.0/ 1.0 Points
age data.xlsx
8 KB
Listed are 29 ages for Academy Award-winning best actors in order from smallest to largest.

See Attached Excel for Data.
Find the 40th percentile. Round one decimal place.
37.8
years
Hint: Use =PERCENTILE.INC function in Excel or use textbook formula (n+1)p/100.