Randomly selected students participated in an experiment to test their ability t

Question

Randomly selected students participated in an experiment to test their ability to determine when one minute (or sixty seconds) has passed. Forty students yielded a sample mean of 62.8 seconds. Assuming that = 9 9 seconds, construct and interpret a 95% confidence interval estimate of the population mean of all students. Click here to view a t distribution table Click here to view page 1 of the standard normal distribution table Click here to view page 2 of the standard normal distribution table What is the 95% confidence interval for the population mean ? (Type integers or decimals rounded to one decimai place as needed)

Explanation / Answer

Solution:- Given that mean = 62.8 , = 9.9 , n = 40 , Z = 1.96

95% confidence interval for the population mean : X +/- Z*s/sqrt(n)

: 62.8 +/- 1.96*9.9/sqrt(40)

:59.7 , 65.9

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