What is the value of the sample test statistic for a one-sided hypothesis test conducted using a 1% significance level.

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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A coffee manufacturer is interested in whether the mean daily consumption of
regular-coffee drinkers is less than that of decaffeinated-coffee drinkers. Assume
that the population standard deviations for those drinking regular-coffee is 1.20 cups
per day and 1.36 cups per day for those drinking decaffeinated-coffee.
A random sample of 50 regular-coffee drinkers showed a mean of 4.35 cups per day;
while a random sample of 40 decaffeinated-coffee drinkers showed a mean of 5.84
cups per day.
What is the value of the sample test statistic for a one-sided hypothesis test
conducted using a 1% significance level.
Express your answer rounded to two decimal places.
Your Answer:
Answer
Transcribed Image Text:A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less than that of decaffeinated-coffee drinkers. Assume that the population standard deviations for those drinking regular-coffee is 1.20 cups per day and 1.36 cups per day for those drinking decaffeinated-coffee. A random sample of 50 regular-coffee drinkers showed a mean of 4.35 cups per day; while a random sample of 40 decaffeinated-coffee drinkers showed a mean of 5.84 cups per day. What is the value of the sample test statistic for a one-sided hypothesis test conducted using a 1% significance level. Express your answer rounded to two decimal places. Your Answer: Answer
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