A random sample of 40 items resulted in a sample mean of 25. The population variance is o² = 25. vel? c) Compute for a 90% confidence interval for the population mean? Interpret your result. Interpretation: d) Compute for a 99% confidence interval for the population mean? Interpret your result.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.4: Collecting Data
Problem 3E
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Answer c and d. Should include interpretation
A random sample of 40 items resulted in a sample mean of 25. The population variance is o² = 25.
vel?
c) Compute for a 90% confidence interval for the population mean? Interpret your result.
Interpretation:
d) Compute for a 99% confidence interval for the population mean? Interpret your result.
Interpretation:
Transcribed Image Text:A random sample of 40 items resulted in a sample mean of 25. The population variance is o² = 25. vel? c) Compute for a 90% confidence interval for the population mean? Interpret your result. Interpretation: d) Compute for a 99% confidence interval for the population mean? Interpret your result. Interpretation:
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