22. Question: The weights of running shoes are normally distributed with a population standard deviation of 3 ounces and an unknown population mean. If a random sample of 23 running shoes is taken and results in a sample mean of 18 ounces, find a 90% confidence interval for the population mean. Round the final answer to two decimal places.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.3: Measures Of Spread
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22. Question: The weights of running shoes are normally distributed with a population standard deviation
of 3 ounces and an unknown population mean. If a random sample of 23 running shoes is taken and
results in a sample mean of 18 ounces, find a 90% confidence interval for the population mean. Round the
final answer to two decimal places.
23. Question: The germination periods, in days, for grass seed are normally distributed with a population
standard deviation of 5 days and an unknown population mean. If a random sample of 17 types of grass
seed is taken and results in a sample mean of 52days, find a 80% confidence interval for the population
mean.
Transcribed Image Text:22. Question: The weights of running shoes are normally distributed with a population standard deviation of 3 ounces and an unknown population mean. If a random sample of 23 running shoes is taken and results in a sample mean of 18 ounces, find a 90% confidence interval for the population mean. Round the final answer to two decimal places. 23. Question: The germination periods, in days, for grass seed are normally distributed with a population standard deviation of 5 days and an unknown population mean. If a random sample of 17 types of grass seed is taken and results in a sample mean of 52days, find a 80% confidence interval for the population mean.
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