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A study investigated if cell phone use impacted student drivers' reaction times. There were two groups:...

A study investigated if cell phone use impacted student drivers' reaction times. There were two groups: 22 students were assigned to the cell phone group while 22 students were assigned to the control group. The experiment measured the response time to traffic lights; for the cell phone group, the mean was 585.7 with a standard deviation of 86.6 and for the control group, the mean was 536.8 with a standard deviation of 66.3. Construct a 90% confidence interval for the difference in mean response times between the cell phone and control groups.

Point Estimate: = x bar 1- x bar2 = 48.9

Margin of Error: E = (round to 4 decimal places)

Lower Limit: (round to 4 decimal places)

Upper Limit: (round to 4 decimal places)

We are 90% confident that the true difference in population means is between LOWER LIMIT and UPPER LIMIT. Please be extremely detailed.

Math   Statistics-And-Probability   
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