please help me i suck at doing math :(

House calls A local plumber makes house calls. She charges $25 to come out to the house and $50
per hour for her services. For example, a 4-hour service call costs $25 + $50(4) = $225.
Statistic
a. The table shows summary statistics for the past
Hours (Service Call)
Cost (Service Call)
month, fill in the table with cost of the service calls.
Mean
Median
SD
IQR
Minimum
4
4.5
1.2
3
0.5
b. This past month, the time the plumber spent on one service call corresponded to a z-score of + 1.75. What was the z-score for the cost of that service call?
13. Health insurance The World Almanac and Book of Facts 2004 reported the percent of people not covered by health insurance in the 50 states and Washington, D.C., for the year 2002. Computer output gives these summaries for the percent of people not covered by health insurance:
a. Were any of the states outliers? Explain how you made your decision.
Min 01 Median 03
Max Mean
SD
7.912.8
13.4 17.6 25.8
13.9 3.6
Histogram of 96 not cavered
14
b. A histogram of the data is as follows:
Is it more appropriate to use the mean and standard deviation or the median and IQR to describe these data? Explain.
16
% not covered
20
14. ACT National data for the ACT in a previous year had a mean of 21.0 and a standard deviation 4.8.
The data showed that it followed an approximately Normal distribution.
a. Draw and clearly label this model.