please answer all parts 3.1 Sampling Distributions 177 3.30 Number of Screws in
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3.1 Sampling Distributions 177 3.30 Number of Screws in a Box A company that sells boxes of screws claims that a box of its screws contains on average 50 screws (11-50). Figure 3.10 shows a distribution of sample means collected from many simulated random samples of size 10 boxes. (a) For a random sample of 10 boxes, is it unlikely that the sample mean will be more than 2 scr different from ? What about more than 5710? (b) If you bought a random sample of 10 boxes at the hardware store and the mean number of screws per box was 42, would you conclude that the company's claim (=50) is likely to be incorrect? (c) If you bought a random box at the hardware store and it only contained 42 screws, would you conclude that the company's claim is likely to be incorrect? 46 48 50 Mean Number of Screws 52 54 Figure 3.10 Sampling distribution for average number of screws in a boxExplanation / Answer
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3.1 Sampling Distributions 177 3.30 Number of Screws in a Box A company that sells boxes of screws claims that a box of its screws contains on average 50 screws (11-50). Figure 3.10 shows a distribution of sample means collected from many simulated random samples of size 10 boxes. (a) For a random sample of 10 boxes, is it unlikely that the sample mean will be more than 2 scr different from ? What about more than 5710? (b) If you bought a random sample of 10 boxes at the hardware store and the mean number of screws per box was 42, would you conclude that the company's claim (=50) is likely to be incorrect? (c) If you bought a random box at the hardware store and it only contained 42 screws, would you conclude that the company's claim is likely to be incorrect? 46 48 50 Mean Number of Screws 52 54 Figure 3.10 Sampling distribution for average number of screws in a boxRelated Questions
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