The standard deviation for a population is o = 14.6. A sample of 17 observations selected from this population gave a mean equal to 143.05. The population is known to have a normal distribution. Round your answers to two decimal places. a. Make a 98% confidence interval for u. ( i b. Construct a 95% confidence interval for μ. ( i i c. Determine a 90% confidence interval for μ. i i

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 11PPS
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The standard deviation for a population is o 14.6. A sample of 17 observations selected from this population gave a mean equal to
143.05. The population is known to have a normal distribution.
Round your answers to two decimal places.
a. Make a 98% confidence interval for u.
b. Construct a 95% confidence interval for μ.
c. Determine a 90% confidence interval for μ.
i
d. Does the width of the confidence intervals constructed in parts a through c decrease as the confidence level decreases?
Transcribed Image Text:= The standard deviation for a population is o 14.6. A sample of 17 observations selected from this population gave a mean equal to 143.05. The population is known to have a normal distribution. Round your answers to two decimal places. a. Make a 98% confidence interval for u. b. Construct a 95% confidence interval for μ. c. Determine a 90% confidence interval for μ. i d. Does the width of the confidence intervals constructed in parts a through c decrease as the confidence level decreases?
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