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School

Arizona State University *

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Course

45087

Subject

Statistics

Date

May 18, 2024

Type

png

Pages

1

Uploaded by CommodoreThunderSkunk41 on coursehero.com

Do cell phones increase drivers' reaction times while driving? A 2003 American Journal of Health Education study investigated the effects of cell phone use on reaction time. In the study, 60 participants were randomly selected and placed into one of two groups: the cell phone group or the control group. Those in the control group participated in the experiment with no distractions, whereas those in the cell phone group had access to text documents on a cell phone. Participants in each group were then asked to take a computerized reaction time test. Researchers then recorded each subject's reaction time in seconds. The table shows the results of the experiment. Population Sample Sample Sample standard Group . L. mean size mean deviation Phone Hp np = 30 }p = 0.546 Sp = 0.213 Control He ne = 30 xc = 0.356 sc = 0.245 df = 56.900 Suppose the researchers wish to examine at a significance level of @ = 0.05 if the mean reaction time for phone users is large than the mean reaction time for the control group. The hypotheses for this test are Hy: pp < uc Hy:pup > uc Use software to determine the corresponding #-statistic and P-value for this two-sample 7-test, rounded to three decimal places. Use an unpooled standard error when calculating the #-statistic for this test.
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