Answered: Construct the confidence interval for…

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 tα/2, (b) find the critical value zα/2, or (c) state that neither the normal distribution nor the t distribution applies. Here are summary statistics for randomly selected weights of newborn girls: n=257, x=31.8hg, s=7.6hg. The confidence level is 99% Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. tα/2=___ (Round to two decimal places as needed.) B. zα/2=___ (Round to two decimal places as needed.) C. Neither the normal distribution nor the t distribution applies.
A random sample of n measurements was selected from a population with unknown mean μ and known standard deviation σ.calculate a 95% confidence interval for μ for the given situation. n=100, x=58, σ=20
Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value tα/2, (b) find the critical value zα/2, or (c) state that neither the normal distribution nor the t distribution applies. Here are summary statistics for randomly selected weights of newborn girls: n=192, x=33.7 hg, s=6.7 hg. The confidence level is 90%. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
Construct the confidence interval for the population mean μ c=0.90 x=7.2, σ=0.6 , n=44 A 90% confidence interval for μ is ?
Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value tα/2, (b) find the critical value zα/2, or (c) state that neither the normal distribution nor the t distribution applies. Here are summary statistics for randomly selected weights of newborn girls: n=218, x=28.6 hg, s=6.6 hg. The confidence level is 99%. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. tα/2=enter your response here (Round to two decimal places as needed.) B. zα/2=enter your response here (Round to two decimal places as needed.) C. Neither the normal distribution nor the t distribution applies.
Construct the indicated confidence interval for the population mean u using the t-distribution. Assume the population is normally distributed c=0.90, x= 13.3, s=4.0, n=6 70 (Round to one decimal place as needed.) €
A random sample of 10 observations are selected from a normal population. Let X be the sample mean and s be the sample standard deviation. Which of the following is not a 95% confidence interval of population mean μ. (X - 10.01,2X+10.04.) X (X-10.025 (X-10.02, +10.03, (X− 10.02.X + 10.03, +10.0250)
Construct the indicated confidence interval for the population mean µ using the t-distribution. Assume the population is normally distributed. c= 0.90, x= 14.6, s= 0.77, n = 17 (Round to one decimal place as needed.)
Pick a, b, or c
A sample of size n = 36 is drawn from a population whose standard deviation is σ = 15.6. The sample mean is x = 94.5. Construct a 95% confidence interval.
Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value tα/2, (b) find the critical value zα/2, or (c) state that neither the normal distribution nor the t distribution applies. Here are summary statistics for randomly selected weights of newborn girls: n=167, x=28.2 hg, s=6.2 hg. The confidence level is 95%. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. tα/2= nothing (Round to two decimal places as needed.) B. zα/2= nothing (Round to two decimal places as needed.) C. Neither the normal distribution nor the t distribution applies.
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 za/2. or (c) state that neither the normal distribution nor the t distribution applies. Here are summary statistics for randomly selected weights of newborn girls: n=D156, x 29.3 hg, s = 7.7 hg. The confidence level is 90%.

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Construct the confidence interval for the population mean μ. c=0.98​, x=15.6​, σ=4.0​, and n=40 A 98​% confidence interval for μ is

Construct the confidence interval for the population mean μ. c=0.98, x=15.6, σ=4.0, and n=40 A 98% confidence interval for μ is