In a sample of 81 U.S. adults aged 18-24 who celebrate Halloween, the mean amount spent on a costume was $40.35 with a standard deviation of $16.8. Round answers to at least 4 decimal places.a) What parameter are we estimating? b) We can work this problem because: c) What is the point estimate of that parameter? d) What is the standard deviation of the sampling distribution for the sample means? e) Find the margin of error for a 90% confidence interval for the true average amount spent on a costume. f) We are 90% confident that the true average amount spent on a Halloween costume for U.S. adults aged 18-24 is between $____ and $_____. Hello, copuld you please help me understand this? please show detail so I can understand . Thank you very much!

In a sample of 81 U.S. adults aged 18-24 who celebrate Halloween, the mean amount spent on a costume was $40.35 with a standard deviation of $16.8. Round answers to at least 4 decimal places.a) What parameter are we estimating? b) We can work this problem because: c) What is the point estimate of that parameter? d) What is the standard deviation of the sampling distribution for the sample means? e) Find the margin of error for a 90% confidence interval for the true average amount spent on a costume. f) We are 90% confident that the true average amount spent on a Halloween costume for U.S. adults aged 18-24 is between $ and $_. Hello, copuld you please help me understand this? please show detail so I can understand . Thank you very much!

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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