Reaction distancedata on the texts website show reaction, Ask an Expert

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Reaction Distance

Data on the text's website show reaction distances in centimeters for the dominant hand for a random sample of 40 independently chosen college students. Smaller distances indicate quicker reactions.

a. Make a graph of the distribution of the sample, and describe its shape.

b. Find, report, and interpret a 95% confidence interval for the population mean.

c. Suppose a professor said that the population mean should be 10 centimeters. Test the hypothesis that the population mean is not 10 cm, using the four-step procedure, with a significance level of 0.05.

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