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(Please type out. I struggle to read handwriting.) 2. Collette is self-employed and sells cookware at home...

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Basic Math

(Please type out. I struggle to readhandwriting.)

2. Collette is self-employed and sells cookware at home parties.She wants to estimate the average amount a client spends at eachparty. A random sample of 35 receipts gave a mean of x? = $34.70with standard deviation s = $4.85.

(a) Find a 90% confidence interval for the average amount spentby all clients.

(b) What conditions are necessary for your calculations?

(c) For a party with 35 clients, use part (a) to estimate arange of dollar values for Collette’s total sales at thatparty.

Answer & Explanation Solved by verified expert
4.0 Ratings (725 Votes)
we want to construct the 90 confidence interval for the averageamount spent by all clientsGiven thatSample mean Sample SD s 485Sample size n    See Answer
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