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 .10 significance level. 1. This is a (Click to select)-tailed test. 2. The decision rule is to reject H0: ?r ? ?d if z < (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) 3. The test statistic is z = (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) 4. What is your decision regarding H0? (Click to select) 5. The p-value is
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State the null and alternative hypotheses: - Null hypothesis (Ho): The mean daily consumption of regular-coffee drinkers is equal to or greater than the mean daily consumption of decaffeinated-coffee drinkers. - Alternative hypothesis (Ha): The mean daily Show moreā¦
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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 1.22 cups per day and 1.33 cups per day for those drinking decaffeinated coffee. A random sample of 54 regular-coffee drinkers showed a mean of 4.55 cups per day. A sample of 48 decaffeinated-coffee drinkers showed a mean of 5.05 cups per day. Use the 0.01 significance level. Is this a 1 tail or two tailed test? State the decision rule( negative amount should be indicated by a minus sign. Round answers to three decimal places.) Compute the value of test statistic ( negative amount should be indicated by a minus sign. Round answers to three decimal places.) what is the p-value
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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 1.36 cups per day and 1.46 cups per day for those drinking decaffeinated coffee. A random sample of 52 regular-coffee drinkers showed a mean of 4.53 cups per day. A sample of 48 decaffeinated-coffee drinkers showed a mean of 5.25 cups per day. Use the 0.100 significance level. a. State the null and alternate hypotheses. b. Compute the test statistic. (Negative values should be indicated by a minus sign. Round your answers to 2 decimal places.) c. Compute the p-value. NOTE: P-value calculators are available through online search. d. What is your decision regarding the null hypothesis?
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 1.22 cups per day and 1.33 cups per day for those drinking decaffeinated coffee. A random sample of 54 regular-coffee drinkers showed a mean of 4.55 cups per day. A sample of 48 decaffeinated-coffee drinkers showed a mean of 5.05 cups per day. Use the 0.01 significance level. State the decision rule( negative amount should be indicated by a minus sign. Round answers to three decimal places.)
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