omar4538

25.03.2020 • 

Mathematics

A study investigated if cell phone use impacted student drivers' reaction times. There were two groups: 27 students were assigned to the cell phone group while 27 students were assigned to the control group. The experiment measured the response time to traffic lights; for the cell phone group, the mean was 585.3 with a standard deviation of 85.2 and for the control group, the mean was 537.9 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.

Ответ:

harvzoie

15.02.2021

Mathematics

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You have to solve the problems, and figure out which two have the same answers/match. -1/4+(-5/3), is the equivalent expression.

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