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May 23, 2015

Posted by **Student** on Monday, July 28, 2008 at 11:24am.

- Amount of money spent: X = $21.34, S=$9.22

- 37 customers own only a dog

- 26 customers own only a cat

- 7 customers own more than one dog and/or cat

a) Construct a 95% confidence interval estimate of the population mean amount in the pet supply.

b) Construct a 90% confidence interval estimate of the population proportion of customers who own only a cat

The branch manager of another outlet (Store 2) wishes to conduct a similar survey in the store. The manager does not have access to the information generated by the manager of Store 1. Answer the following questions:

c) What sample size is needed to have 95% confidence of estimating the population mean amount spent in his store within +/-$1.50 if the standard deviation is $10

d) What sample size is needed to have 90% confidence of estimating the population proportion of customers who own only a cat to within +/-0.045?

e) Based on your answers for c and d, how large a sample should the manager take?

Note*The manager at store 2 only has enough money budgeted to do one sample analysis

- statistics help Part.2 -
**Student**, Monday, July 28, 2008 at 11:25am- Amount of money spent: X = $21.34, S=$9.22

- 37 customers own only a dog

- 26 customers own only a cat

- 7 customers own more than one dog and/or cat

a) Construct a 95% confidence interval estimate of the population mean amount in the pet supply.

b) Construct a 90% confidence interval estimate of the population proportion of customers who own only a cat

- statistics help Part.3 -
**Student**, Monday, July 28, 2008 at 11:27amThe branch manager of another outlet (Store 2) wishes to conduct a similar survey in the store. The manager does not have access to the information generated by the manager of Store 1. Answer the following questions:

c) What sample size is needed to have 95% confidence of estimating the population mean amount spent in his store within +/-$1.50 if the standard deviation is $10

d) What sample size is needed to have 90% confidence of estimating the population proportion of customers who own only a cat to within +/-0.045?

e) Based on your answers for c and d, how large a sample should the manager take?

Note: The manager at store 2 only has enough money budgeted to do one sample analysis.

- statistics help Part.3 -
- statistics help -
**drwls**, Monday, July 28, 2008 at 12:13pmIncomplete post

- statistics help -
**Student**, Monday, July 28, 2008 at 1:22pmFor complete post, please see Statistics help with Statistics help Part 2 and Part 3