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题目
多项填空题
Question at position 19 Frank hosts a listening party for his newest album. After the guests listen to his songs, he asks them to rate how much they enjoyed the music. He’s curious if this sample of 64 listeners’ rating of his new album is similar to his previous albums. He knows that the population mean enjoyment for his other albums is μ = 96 (out of 100), with a standard deviation of σ = 4. In order to do that, he first needs to calculate the standard error. Based on the information given, what should he get for the standard error? Printed Blank[input]Question Blank 1 of 2[input] Frank’s record label has been upset with him for how long it has taken for him to release his newest album. He wants to go to his record label and show them that it was worth the wait and give them a range of values within which he’s confident that the population mean level of enjoyment is estimated to fall. His sample of 64 listeners gave an average rating of 88 (x̄ = 88) out of 100. Calculate the 95% confidence interval (you may need to use your calculation from the part above). Printed Blank[input]Question Blank 2 of 2[input].41.5.47.43[78.02, 90.78][87.02, 88.98][86.71, 87.08][86.71, 89.29]
选项
A.0.5
B.
C.
D.
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标准答案
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思路分析
To start, we identify the two parts of the problem: first, the standard error with known population sigma, and second, the 95% confidence interval using that standard error.
Option 1 (0.5): This value represents the standard error, computed as sigma divided by the square root of n. Given sigma = 4 and n = 64, ......Login to view full explanation登录即可查看完整答案
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类似问题
If we change a 95% confidence interval estimate to a 90% confidence interval estimate, we can expect the _____.
The expression used to compute an interval estimate of μ may depend on any of the following factors EXCEPT _____.
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What value of z should you use for a 99% confidence interval for the difference of two population proportions?
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为了让更多留学生在备考与学习季更轻松,我们决定将Gold 会员限时免费开放至2025年12月31日!