A Psychologist Is Collecting Data on the Time It Takes

question 142

Multiple Choice

A psychologist is collecting data on the time it takes to learn a certain task.For 50 randomly selected adult subjects,the sample mean is 16.40 minutes and the sample standard deviation is 4.00 minutes.Construct the 95% confidence interval for the mean time required by all adults to learn the task.

• A)[8.56 24.24]
• B)[15.47 17.33]
• C)[16.24 16.56]
• D)[15.29 17.51]
• E)[17.12 48.48]

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