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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 the population standard deviation for those drinking regular coffee is 1.21 cups per day and 1.40 cups per day for those drinking decaffeinated coffee. A random sample of 54 regular-coffee drinkers showed a mean of 4.59 cups per day. A sample of 49 decaffeinated-coffee drinkers showed a mean of 5.64 cups per day. Use the 0.100 significance level. a. Is this a one-tailed or a two-tailed test? O One-tailed test. O Two-tailed test. b. State the decision rule. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) The decision rule is to reject H0: µRegular 2 µDecaf if z c. Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) Value of the test statistic

A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less than that of decaffeinated-coffee drinkers. Assume the population standard deviation for those drinking regular coffee is 1.21 cups per day and 1.40 cups per day for those drinking decaffeinated coffee. A random sample of 54 regular-coffee drinkers showed a mean of 4.59 cups per day. A sample of 49 decaffeinated-coffee drinkers showed a mean of 5.64 cups per day. Use the 0.100 significance level. a. Is this a one-tailed or a two-tailed test? O One-tailed test. O Two-tailed test. b. State the decision rule. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) The decision rule is to reject H0: µRegular 2 µDecaf if z c. Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) Value of the test statistic

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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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 the population standard deviation for those drinking regular coffee is 1.21 cups per day and 1.40 cups per day for those drinking decaffeinated coffee. A random sample of 54 regular-coffee drinkers showed a mean of 4.59 cups per day. A sample of 49 decaffeinated-coffee drinkers showed a mean of 5.64 cups per day. Use the 0.100 significance level. a. Is this a one-tailed or a two-tailed test? O One-tailed test. O Two-tailed test. b. State the decision rule. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) The decision rule is to reject H0: µRegular 2 µDecaf if z c. Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) Value of the test statistic
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 the population standard deviation for those drinking regular coffee is 1.21 cups per day and 1.40 cups per day for those drinking decaffeinated coffee. A random sample of 54 regular-coffee drinkers showed a mean of 4.59 cups per day. A sample of 49 decaffeinated-coffee drinkers showed a mean of 5.64 cups per day. Use the 0.100 significance level. a. Is this a one-tailed or a two-tailed test? O One-tailed test. O Two-tailed test. b. State the decision rule. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) The decision rule is to reject H0: µRegular 2 µDecaf if z c. Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) Value of the test statistic
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