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# I have the problems with my business statistics homework that

### Customer Question

I have the problems with my business statistics homework that I need help with. It needs to be in Excel to show all the formulas. I am just not understanding the assignment.
7.15 and 7.30
8.1,8.10,8.11,8.17,8.32,8.37,8.40
7.15
7.15 Given a normal distribution with and
, if you select a sample of , what is the probability
that is
a. less than 95?
b. between 95 and 97.5?
c. above 102.2?
d. There is a 65% chance that is above what value?
7.30 According to Gallup’s poll on consumer behavior,
36% of Americans say they will consider only cars manufactured
by an American company when purchasing a new car.
(Data extracted from The Gallup Poll, www.gallup.com,
March 31, 2010.) If you select a random sample of
200 Americans,
a. what is the probability that the sample will have between
30% and 40% who say they will consider only cars manufactured
by an American company when purchasing a
new car?
b. the probability is 90% that the sample percentage will be
contained within what symmetrical limits of the population
percentage?
c. the probability is 95% that the sample percentage will be
contained within what symmetrical limits of the population
percentage?
Please write me for the other questions cause I am not sure if this is the correct place to enter in all the questions.
Submitted: 1 year ago.