A marketing firm obtained random samples of 20 people in five regions of the country to investigate the level of interest in a new product. People in the sample were asked to rate
their level of interest on a scale from 1 to 10, with 1 being the least amount of interest and
10 being the greatest. The histograms show the results for each region. The graph for which
region displays data for level of interest with the least standard deviation?
Region A
no Region B
Region C
(A) Region A
(B) Region B
(C) Region C
1 2 3 4 5 6 7 8 9 10
Level of Interest
12345678910
Level of Interest
1 2 3 4 5 6 7 8 9 10
Level of Interest
Region D
Region E
- (D) Region D
(E) Region E
Frequency
Frequency
1 2 3 4 5 6 7 8 9 10
Level of Interest
1 2 3 4 5 6 7 8 9 10
Level of Interest