1. Suppose a certain species of birds has an average weight of = 3.55 grams. Based on previous studies, we can assume that the weights of these birds have a normal distribution with o = 0.29 grams. For a small group of 10 birds, find the confidence intervals for the average weights of these birds based on the confidence levels listed below. Round the intervals to two decimal places. Write a statement for each confidence interval and then answer part c. a. 85% Confidence Interval: Statement:

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Q: If n=18, (x-bar)=42, and s=17, construct a confidence interval at a 80% confidence level. Assune the…

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Q: If n = 10, ¯xx¯ = 43, and s = 8, construct a confidence interval at a 90% confidence level. Assume…

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Q: If n=28, (x-bar)=50, and s=10, construct a confidence interval at a 99% confidence level. Assume the…

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Q: If n=14, (x-bar)=37, and s=7, construct a confidence interval at a 98% confidence level. Assume the…

A: Given,n=14x¯=37s=7degrees of freedom(df)=n-1df=14-1=13α=1-0.98=0.02α2=0.01t0.01(13)=2.650     (from…

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Q: If n=31, (x-bar)=49, and s=3, construct a confidence interval at a 80% confidence level. Assume the…

A: Given, Sample size = 31 Sample mean = 49 Sample standard deviation = 3   Since the population…

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A: Given Sample size n = 15  degree of freedom = n-1 =14 x the level of confidence interval   98 %…

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Q: construct a confidence interval at a 98% confidence level.

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Q: If n = 16, 7 = 43, and s = 17, construct a confidence interval at a 98% confidence level. Assume the…

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Q: Assuming that the population is normally distributed, construct a 95% confidence interval estimate…

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Q: If n=12, (x-bar)=33, and s=16, construct a confidence interval at a 80% confidence level. Assume the…

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Q: If n = 25, ¯x = 50, and s = 19, construct a confidence interval at a 99% confidence level. Assume…

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Q: If n-28, 2(x-bar)-38, and s-13, construct a confidence interval at a 98% confidence level. Assume…

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Q: Which of the following would result in the narrowest confidence interval? A. 80% confidence level…

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Q: If n=24, ¯xx¯(x-bar)=49, and s=9, construct a confidence interval at a 80% confidence level. Assume…

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Q: If n=15, ¯xx¯=43, and s=11, construct a confidence interval at a 90% confidence level. Assume the…

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Q: If n=27, x=48, and s-6, construct a confidence interval at a 80% confidence level. Assume the data…

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Q: If n = 17, ¯xx¯ = 33, and s = 6, construct a confidence interval at a 99% confidence level. Assume…

A: We have, If n = 17, x¯ = 33, and s = 6, alpha=1-0.99= 0.01 Therefore  Degrees of freedom= n-1=16…

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A: Sample mean =50Sample standard deviation = 7Sample size = 1580% confidence level

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Q: If n=15, ¯xx¯(x-bar)=40, and s=9, construct a confidence interval at a 98% confidence level. Assume…

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Q: If n=15, ¯xx¯(x-bar)=33, and s=19, construct a confidence interval at a 80% confidence level. Assume…

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Q: If n=25, z-46, and s=5, construct a confidence interval at a 95% confidence level. Assume the data…

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