Statistics for Decision- Making in Business - Maricopa Community ...

Relative Frequency
35%
30%
25%
20%
15%
10%
5%
0%
Percent Enrolled
Percentage
The majority of people in Central Africa are not enrolled in school, since it is
predominantly the case that fewer than 50% of people in each nation attend school.
f. We know that ̅ and . A percentage of 79.6% is
standard deviation from the mean. We would expect that at least
( )
of all enrollment percentages would be within one standard deviation of the mean.
This is considered to be a very normal percentage (it is still within the “average”
spread).
3.
a. The range is 5750, which tells us that there is a difference of 5,750 feet from the
shortest street to the longest street. The interquartile range is 2170, telling us that
the middle 50% of all street lengths range from 980 feet to 3,150 feet. The
standard deviation is 1634, telling us that, on average, a street varies by 1,634 feet
from the mean street length.
b. The interquartile range is 2170, telling us that the middle 50% of all street lengths
range from 980 feet to 3,150 feet. The standard deviation is 1634, telling us that,
on average, a street varies by 1,634 feet from the mean street length.
c.
Statistics for Decision-Making in Business © Milos Podmanik Page 223