Question
In: Statistics and Probability
A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less...
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 1.49 cups per day for those drinking decaffeinated coffee. A random sample of 46 regular-coffee drinkers showed a mean of 4.50 cups per day. A sample of 37 decaffeinated-coffee drinkers showed a mean of 5.05 cups per day.
Use the 0.025 significance level.
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Is this a one-tailed or a two-tailed test?
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One-tailed test.
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Two-tailed test.
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State the decision rule. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
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Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
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What is the p-value?
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What is your decision regarding H0?
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Do not reject H0.
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Reject H0.
Solutions
orchestra answered 2 years agoRelated Solutions
A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less...
A coffee manufacturer is interested in whether the mean daily
consumption of regular-coffee drinkers is less than that of
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deviation for those drinking regular coffee is 1.45 cups per day
and 1.59 cups per day for those drinking decaffeinated coffee. A
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A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less...
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 1.29 cups per day
and 1.44 cups per day for those drinking decaffeinated coffee. A
random sample of 55 regular-coffee drinkers showed a mean of 4.41
cups per day. A sample of 47 decaffeinated-coffee drinkers showed a
mean of 5.16 cups per day.
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A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less...
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 1.39 cups per day
and 1.55 cups per day for those drinking decaffeinated coffee. A
random sample of 45 regular-coffee drinkers showed a mean of 4.59
cups per day. A sample of 39 decaffeinated-coffee drinkers showed a
mean of 5.19 cups per day.
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A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is less...
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deviation for those drinking regular coffee is 1.21 cups per day
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A coffee manufacturer is interested in whether the mean daily consumption of regular- coffee drinkers is...
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 for those drinking decaffeinated coffee. A random sample
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sample of 49 decaffeinated coffee drinkers showed a mean of 5.64
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