Consider The Previous Questions On Cell Phone Weights It Is Reproduced Below If Manufacturers Hypothesize That The Tru 1 (48.44 KiB) Viewed 17 times
Consider The Previous Questions On Cell Phone Weights It Is Reproduced Below If Manufacturers Hypothesize That The Tru 2 (24.79 KiB) Viewed 17 times
Consider the previous questions on cell phone weights. It is reproduced below. If manufacturers hypothesize that the true mean weight is 160 g, then choose the correct answer based on your confidence interval result Hint: we cover this in the video "CI 2020 2" [Cell phones have become an essential part of our everyday lives. We use them for communication, photography, browsing, and banking, among other things. Choosing the right cell phone is important, and is based on several factors, including weight. Suppose the weight of a cell phone is distributed normally with a known population standard deviation of 18 g. A random sample of 15 cell phones was conducted to calculate a sample mean weight of 155.7 8. Construct a 95% confidence interval for the population mean weight, mu. Choose the correct answer below based on constructing this interval. Hint: although the sample size is small, you may use the standard normal distribution, as the population standard deviation is known. Hint: we cover this in the video "CI 2020 2") a
a) a. Because the confidence interval does not contain the hypothesized value, we fail to reject their hypothesis Ob) b. Based on the range of the interval, we reject the hypothesis Oc) c. Based on the range of the interval, we fail to reject the hypothesis O d) d. Because the confidence interval does contain the hypothesized value, we reject their hypothesis
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