Summary Report for cholest group-2 A Squared 0661633 Skewte09082 st Quartile rd

Question

Summary Report for cholest group-2 A Squared 0661633 Skewte09082 st Quartile rd Quarte 204.50 95s Confidence Interval for 95% Confidence interval for Summary Report for cholest group = 1 253.93 2276 29 0.472748 72.43 7.72 1. Using the summary information Minitab has generated, calculate and provide the interquartile range (IQR) for each group 2. Based on the Minitab output you have produced so far, state why it may be more appropriate to perform a two-sample t-test assuming 1 2 2 2 rather than 12 2 2 (state specific values from output for full credit) 3. Briefly comment (in the context of the data and research question) on which group seems to have higher cholesterol values and how this relates to the research question at hand

Explanation / Answer

Result:

1).

Group 1, IQR = Q3-Q1 =282-224.5 = 57.5

Group 2, IQR = Q3-Q1 =204-178 =26

2).

For Group1, 95% CI for sd =(37.72, 64.94)

For Group2, 95% CI for sd =(17.76, 29.95)

The two intervals are not overlapping. Therefore at 95% level, there is significant difference in standard deviations between the two groups.

3).

Mean cholesterol level for group 1 is 253.93 and group 2 is 193.13.

Group 1 has higher Mean cholesterol level than group 2.

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