There were actually 464 responses to the class survey. One student had claimed to study 10,000 hours per week (10,000 is more than the number of hours in a year). We know he's joking, so we left out this value. If we did a calculation without looking at the data, we would get ?¯=35.2 hours for all 464 students. Now what is the 99% confidence interval for the population mean? Continue to use ?=7.4 . (Round your answers to three decimal places.)
A class survey in a large class for first‑year college students asked, “About how many hours do you study during a typical week?” The mean response of the 463 students was ?¯=13.7 hours. Suppose that we know that the study time follows a
There were actually 464 responses to the class survey. One student had claimed to study 10,000 hours per week (10,000 is more than the number of hours in a year). We know he's joking, so we left out this value. If we did a calculation without looking at the data, we would get ?¯=35.2 hours for all 464 students. Now what is the 99% confidence interval for the population mean? Continue to use ?=7.4 . (Round your answers to three decimal places.)
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