In a Study of Left- and Right-Handers' Reaction Times to Tones

question 13

Essay

In a study of left- and right-handers' reaction times to tones delivered to the right ear,
the left-handers' reaction times were approximately normally distributed with a mean
of 240 milliseconds and standard deviation of 32 milliseconds. The mean reaction
time for right-handers was 210 ms.
a) Sketch a normal distribution that describes left-handers' reaction times, and
locate the mean reaction time for right-handers in this distribution.
b) About what proportion of left-handers reaction times would be "better" (that is,
smaller) than the mean reaction time for right-handers?

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