3.  Find the confidence interval. a) In a Gallup poll of 1000 adults, 649 of them said that they consumed alcohol. Construct a 99% confidence interval estimate of the proportion of adults who consume alcoholic beverages.

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A: It is given that the mean number of text messages sent per day is 40.9 for men, 42.0 for women. The…

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Q: 2. Construct a 95% confidence interval for the population standard deviation of a random sample of…

A: given data   sample size(n) = 15 sample standard deviation(s)  = 12.7construct 95 % ci for σ.

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A: Given that  Mean = M = 1030 , Standard deviation = SD = 70 X ~ Normal (M = 1030 , SD = 70)

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A: Using Excel formula “=NORM.S.INV(1-(0.04/2))”, the critical value for 96% confidence level is…

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A: a.

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A: 18. Let μ1 be the population mean number of text messages sent per day among men, and μ2 be the…

Q: 4. The principal of a high school randomly selected 36 students to take an aptitude test. Their…

A: Given,   Sample size = 36 Sample mean = 81.3 Population standard deviation = 7.8   Since the…

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A: as per Bartleby guideline expert have to answer first question only dear students please upload…

Q: he average weight of 20 randomly selected cars was 3500 pounds. The sample standard deviation was…

A: given data, n=20df=n-1=20-1=19x¯=3500 pounds s=315 pounds CI=0.90α=1-0.90=0.10

Q: A 95% confidence interval for the mean was computed with a sample of size 90 to be (16,22). a. What…

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Q: In a poll, 1200 adults in a region were asked about their online vs. in-store clothes shopping. One…

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A: Given that :  Sample size (n) = 20 Sample mean = $ 3120 S = $ 677 Confidence interval = 95%

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Q: ) H0: ?1 − ?2 = 0 Ha: ?1 − ?2 > 0     t=_________ P-value_______   State the conclusion in the…

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Q: For the sample data set: (0,0) (2,3) (3,3) (6,4) (9,8) a. Give a point estimate for the mean value…

A: The given data set is (0, 0), (2, 3), (3, 3), (6, 4), and (9, 8).

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