Question 5
10 Points
The name of a statistics that is used to describe the number of standard deviations a data value is above or below the
mean is called
A quartile
A percentile
A coefficient of variation
A Z score
Question 6
10 Points
What is the value of the mode when all values in the data set are different?
0
1
There is no mode
It cannot be determined unless the data values are given
Question 7
10 Points
The three data sets have the same mean and range, but is the variation the same? Prove your answers by compute the standard
deviation. Assume the data were obtained from samples.
a. 5,7,9,11,13,15,17
b. 5,6,7,11,15,16,17
c. 5,5,5,11,17,17,17,
Mean = 11
Range= 17-5 = 12
No, (a) has the smallest variation; (c) has the biggest variation
Mean = 11
Range= 5-12 = -12
No, (a) has the smallest variation; (c) has the biggest variation
Mean = 10
Range= 17-5 = 12
No, (a) has the smallest variation; (c) has the biggest variation
None of the above
