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Brewed decaffeinated coffee contains some caffeine. We want to estimațe the amount of caffeine in 8 ounce cups of decaf coffee at local fast food restaurants. Assume that the standard deviation in the amount of caffeine in 8 ounces of decaf coffee is known to be 2 mg. We took a sample of 256 eight-ounce cups of coffee from fast food restaurants on Robert Street in West St. Paul. The sample mean amount of caffeine turned out to be 8 mg. Construct a 90%.confidence interval estimate for the true mean amount of caffeine in eight-ounce cups of decaf coffee, using the information described above. Type the formula for your confidence interval into the text box first and then type a second version where you fill in all of the numbers in your formula. You don't have to calculate the final numeric result.

Brewed decaffeinated coffee contains some caffeine. We want to estimațe the amount of caffeine in 8 ounce cups of decaf coffee at local fast food restaurants. Assume that the standard deviation in the amount of caffeine in 8 ounces of decaf coffee is known to be 2 mg. We took a sample of 256 eight-ounce cups of coffee from fast food restaurants on Robert Street in West St. Paul. The sample mean amount of caffeine turned out to be 8 mg. Construct a 90%.confidence interval estimate for the true mean amount of caffeine in eight-ounce cups of decaf coffee, using the information described above. Type the formula for your confidence interval into the text box first and then type a second version where you fill in all of the numbers in your formula. You don't have to calculate the final numeric result.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Brewed decaffeinated coffee contains some caffeine. VWe want to estimate the amount of caffeine in 8 ounce cups of decaf coffee at local fast food restaurants. Assume that the standard deviation in the amount of caffeine in 8 ounces of decaf coffee is known to be 2 mg. We took a sample of 256 eight-ounce cups of coffee from fast food restaurants on Robert Street in West St. Paul. The sample mean amount of caffeine turned out to be 8 mg. Construct a 90% confidence interval estimate for the true mean amount of caffeine in eight-ounce cups of decaf coffee, using the information described above. Type the formula for your confidence interval into the text box first'and then type a second version where you fill in all of the numbers in your formula. You don't have to calculate the final numeric result.
Transcribed Image Text:Brewed decaffeinated coffee contains some caffeine. VWe want to estimate the amount of caffeine in 8 ounce cups of decaf coffee at local fast food restaurants. Assume that the standard deviation in the amount of caffeine in 8 ounces of decaf coffee is known to be 2 mg. We took a sample of 256 eight-ounce cups of coffee from fast food restaurants on Robert Street in West St. Paul. The sample mean amount of caffeine turned out to be 8 mg. Construct a 90% confidence interval estimate for the true mean amount of caffeine in eight-ounce cups of decaf coffee, using the information described above. Type the formula for your confidence interval into the text box first'and then type a second version where you fill in all of the numbers in your formula. You don't have to calculate the final numeric result.
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