Question

An experiment to evaluate the effect of using a cell phone on reaction
time was done as follows: Forty-eight subjects were asked to perform a
simulated driving task while talking on a cell phone. While performing
the task, occasional red and green lights flashed on the computer screen.
If a green light flashed, subjects were to continue driving, but if a red
light flashed, subjects were to break as quickly as possible and the
reaction time (in msec) was recorded. The following summary statistics
were found: x = 530, s = 70.
(a) Define the parameter of interest to the researchers.
(b) Compute a 95% confidence interval for the target parameter. Interpret the result.
(c) What assumption(s) must be made in order to generalize this confidence interval to the population of all drivers?

Answer 1

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