Mathematics, 06.04.2020 18:36 Chapo3760
"Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts (a) through (c) below. TInterval (13.046,22.15) x= 17.598 Sx = 16.01712719 n= 50 a. Express the confidence interval in the format that uses the ""less than"" symbol. Given that the original listed data use one decimal place, round the confidence interval limits accordingly."b. Identify the best point estimate of μ and the margin of error.
c. In constructing the confidence interval estimate of μ, why is it not necessary to confirm that the sample data appear to be from a population with a normaldistribution?
A. Because the sample standard deviation is known, the normal distribution can be used to construct the confidence interval.
B. Because the sample is a random sample, it can be assumed that the sample mean is from a population with a normal distribution.
C. Because the population standard deviation is known, the normal distribution can be used to construct the confidence interval.
D. Because the sample size of 50 is greater than 30, it can be assumed that the sample mean is from a population with a normal distribution.
Answers: 3
Mathematics, 21.06.2019 21:30
Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.
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Mathematics, 21.06.2019 22:00
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Mathematics, 22.06.2019 04:00
Factor these polynomials and explain how 1. 12x - 3x^2 2. 20 - 240x^2
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"Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. C...
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