4. A simple random sample of size 35 has a sample mean of 34.85 and a sample standard deviation of 17.9. a) Construct a 98% confidence interval for the population mean. Show all steps in your method. b) If the confidence level was 95%, would the confidence interval be narrower or wider. Explain why.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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4. A simple random sample of size 35 has a sample mean of 34.85 and a sample
standard deviation of 17.9.
a) Construct a 98% confidence interval for the population mean. Show all
steps in your method.
b) If the confidence level was 95%, would the confidence interval be
narrower or wider. Explain why.
Transcribed Image Text:4. A simple random sample of size 35 has a sample mean of 34.85 and a sample standard deviation of 17.9. a) Construct a 98% confidence interval for the population mean. Show all steps in your method. b) If the confidence level was 95%, would the confidence interval be narrower or wider. Explain why.
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