Assume that we want to construct a confidence Interval. Do one of the following, as appropriate: (a) find the critical value a/2. (0) find the critical value Za/2 distribution applies. (C) state that nelther the hormal distr Here are summary statistics for randomly selected weights of newborn girls: n = 227, x = 30.9 hg, s= 6.7 hg. The confidence level is 99%. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. tu/2= (Round to two decimal places as needed.) O B. Za/2 = (Round to two decimal places as needed.)

Assume that we want to construct a confidence Interval. Do one of the following, as appropriate: (a) find the critical value a/2. (0) find the critical value Za/2 distribution applies. (C) state that nelther the hormal distr Here are summary statistics for randomly selected weights of newborn girls: n = 227, x = 30.9 hg, s= 6.7 hg. The confidence level is 99%. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. tu/2= (Round to two decimal places as needed.) O B. Za/2 = (Round to two decimal places as needed.)

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value ta/2. (b) find the critical value z/2, or (c) state that neither the normal distribution nor the t distribution applies. The confidence level is 95%, o is not known, and the histogram of 62 player salaries (in thousands of dollars) of football players on a team is as shown.
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Allen's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.t Suppose a small group of 20 Allen's hummingbirds has been under study in Arizona. The average weight for these birds is x = 3.15 grams. Based on previous studies, we can assume that the weights of Allen's hummingbirds have a normal distribution, with o = 0.32 gram. (a) Find an 80% confidence interval for the average weights of Allen's hummingbirds in the study region. What is the margin of error? (Round your answers to two decimal places.) lower limit upper limit margin of error (b) What conditions are necessary for your calculations? (Select all that apply.) O normal distribution of weights Oo is known O n is large O o is unknown O uniform distribution of weights (c) Interpret your results in the context of this problem. O The probability that this interval contains the true average weight of Allen's hummingbirds is 0.20. O we are 80% confident that the true average weight of Allen's hummingbirds falls…
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