A researcher randomly divided subjects into a treatment and control group, and after completing the study, wanted to test the hypothesis that the mean of the treatment group was different from the mean of the control group. The following sample statistics were obtained. n Mean Standard Deviation Treatment 20 2.55 1.43 Control 20 1.50 1.50 What is the 99% confidence interval on the difference in means? Provide your answer rounded to three decimals. Provide negatives when needed. Provide leading zeros for decimal values. Lower limit= Upper Limit= Based on the confidence interval you computed, is there a difference between the mean of the treatment and control groups at alpha = .01? Yes or No.
A researcher randomly divided subjects into a treatment and control group, and after completing the study, wanted to test the hypothesis that the
n Mean Standard Deviation
Treatment 20 2.55 1.43
Control 20 1.50 1.50
What is the 99% confidence interval on the difference in means? Provide your answer rounded to three decimals. Provide negatives when needed. Provide leading zeros for decimal values.
Lower limit=
Upper Limit=
Based on the confidence interval you computed, is there a difference between the mean of the treatment and control groups at alpha = .01? Yes or No.
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