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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Definitions:

Pericardium

The fibrous sac that surrounds the heart, providing it with protection and the lubrication necessary for efficient movement.

Peritoneum

A membrane that lines the abdominal cavity and covers the abdominal organs.

Ventral

Relating to the body's front or anterior part, and the opposite of the dorsal side.

Internal Nares

Openings located inside the nasal cavity, also known as choanae, they connect the nose to the throat.