A matched pairs study was introduced in which 47 participants had cell phones pu

Question

A matched pairs study was introduced in which 47 participants had cell phones put on their ears and then had their brain glucose metabolism (a measure of brain activity) measured under two conditions: with one cell phone turned on for 50 minutes (the "on" condition) and with both cell phones off (the "off" condition). Brain glucose metabolism is measured in mu mol/100 g per minute, and the differences of the metabolism rate in the on condition minus the metabolism rate in the off condition were computed for all participants. The mean of the differences was 2.4 with a standard deviation of 6.3. Use the information to test to see if there is evidence that mean glucose metabolism is higher when a cell phone is nearby. Give the test statistic and the p-value. Round your answer for the test statistic to two decimal places and your answer for the p-value to three decimal places. test statistic = p-value =

Explanation / Answer

From following results t=2.61 and p-value= 0.006

One-Sample T

Test of = 0 vs > 0

N Mean StDev SE Mean 95% Lower Bound T P
47 2.400 6.300 0.919 0.857 2.61 0.006

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