Suppose that the average time spent per day with digital media several years ago was 3 hours and 44 minutes. For last​ year, a random sample of 20 adults in a certain region spent the numbers of hours per day with digital media given in the accompanying table. Preliminary data analyses indicate that the​ t-interval procedure can reasonably be applied. Find and interpret a 90​% confidence interval for last​ year's mean time spent per day with digital media by adults of the region.​ (Note: x=5.12 hr and s=2.24

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Q: From the normally distributed systolic blood pressures of a given patient population with a standard…

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Q: what sample size should be used to obtain a 99% confidence interval for the mean with +/-15 if the…

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Q: 90% confidence

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.