A random sample of nine students took 18, 19, 13, 24, 22, 21, 22, 17, and 25 minutes to complete the telephone registration process for courses at Sacramento City College. Estimate the mean time that it takes students to complete the telephone registration process at Sacramento City College using a 95% confidence interval. Express your answer symbolically and verbally.Problem 2

Q: If X = 117, o=24, and n = 30, construct a 99% confidence interval estimate of the population mean, µ

A: It is given that Sample size n = 30 Sample mean = 117 Population SD = 24

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A: Given,n=340p^=0.921-p^=1-0.92=0.08α=1-0.90=0.1α2=0.05Z0.05=1.645

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A: Solution We solve it by using excel

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Q: If n = 41, ã=30, and s = 6, construct a confidence interval at a 80% confidence level.

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Q: In this example, Ha is the mean value of the differences d for the population of all pairs of data,…

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.