The lifetime of a certain type of battery is known to be normally distributed with standard deviation o=22 hours. A sample of 50 batteries had a meanlifetime of 120.1 hours. It is desired to construct a 95% confidence interval for the mean lifetime for this type of battery.Part 1 of 6(a) What is the point estimate?The point estimate is 120.1Part: 1/6 -Part 2 of 6(b) Find the critical value.The critical value isSkip PartCheckType here to searchXSB16no17 C-18Save For LaterSubmit© 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center60°F?19144hoA 01ADI

GIVEN DATA, normal distributionσ=22n=50x¯=120.1CI=0.95α=1-0.95=0.05

Answered: The lifetime of a certain type of…

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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Find the critical value zα/2 needed to construct a(n) 98.3% confidence interval.
Assessment Task: Statistical Intervals 1. A random sample of size n1 = 25, taken from a normal population with a standard deviation ol = 5, has a mean 1 = 80. A second random sample of size n2 = 36, taken from a different normal population with a standard deviation o2 3, has a mean 2 = 75. Find a 95% confidence interval for ul - u2 %3D
Part 1 of 2 (a) How large a sample must be Round the critical value to no les Round the sample size up to the A sample size of is needec 4.7. Part 2 of 2 (b) If the required confidence (Choose one) ▼ because
Assume that last year in a particular state there were 211 children out of 1990 who were diagnosed with Autism Spectrum Disorder. Nationally, 1 out of 88 children are diagnosed with ASD. It is believed that the incident of ASD is more common in that state than nationally. Calculate a 96% confidence interval for the percentage of children in that state diagnosed with ASD.P: Parameter What is the correct parameter symbol for this problem? What is the wording of the parameter in the context of this problem? A: Assumptions Since information was collected from each object, what conditions do we need to check? Check all that apply. n≥30n≥30 or normal population. N≥20nN≥20n n(pˆ)≥10n(p̂)≥10 σσ is known. σσ is unknown. n(1−pˆ)≥10n(1-p̂)≥10 Check those assumptions: 1. nˆpnp^= which is 2. n(1−ˆp)n(1-p^)= which is 3. NN= which is If no N is given in the problem, use 1000000N: Name the procedure The…
Import the data from the Hill City Excel file into Minitab.You are trying to predict Price.Note: Mtn View=1 if there is a mountain view, 0 otherwise. The rest of the variables should be self explanatory. 1.Perform an F Test for overall significance of the model 2.Perform a T test for slope for the age variable 3. Find a 95% confidence interval for the slope of the SqFeet variable4. Create a prediction, CI, and PI for 1 new set of x values (any valid numbers you want), and interpret each.5. Run the residual plots and indicate if they show any problems with the model.
Here are summary statistics for randomly selected weights of newborn girls: n=36, x=3211.1g, s=689.4g. Use a confidence level of 95% to complete parts (a) through (d) below. a. Identify the critical value tα/2 used for finding the margin of error. tα/2=enter your response here (Round to two decimal places as needed.) Part 2 b. Find the margin of error. E=enter your response here g (Round to one decimal place as needed.) Part 3 c. Find the confidence interval estimate of μ. enter your response here g<μ<enter your response here g (Round to one decimal place as needed.) Part 4 d. Write a brief statement that interprets the confidence interval. Choose the correct answer below. A. One has 95% confidence that the interval from the lower bound to the upper bound contains the true value of the population mean weight of newborn girls. B. One has 95% confidence that the sample mean weight of newborn girls is equal to the population mean weight of…
Suppose you have 36 observations from a Poisson distribution with parameter λ. Suppose the sample mean of the 36 observations is 3.7. (a) Calculate an upper confidence bound for λ using a confidence level of 95%. ( b) Calculate a lower confidence bound for λ using a confidence level of 95%. (c) Calculate a two sided confidence interval for λ using a confidence level of 95%.
A telephone poll of 841 adult Americans was reported in an issue of Time Magazine. One of the questions asked was, "What is the main problem facing the country?" Forty percent answered, "crime." Construct a 88% confidence interval for the population proportion of Americans who feel that crime is the main problem.p'=α2=zα2=Margin of Error: E=We are 88% confident that the proportion of Americans who feel that crime is the main problem is between____ and ____.
We obtain the following demand curve of beef in a market with 25 observations: Q = 635.736 - 48.165 P, where Q is the quantity demanded of beef measured in pounds, P is price measured in dollars per pound. The standard error of the slope coefficient is 2.546. What is the upper bound of the 95% confidence interval of the slope coefficient? note: df = n-2
Here are summary statistics for the weights of Pepsi in randomly selected cans: n=36, x=0.82412 lb, s=0.00573 lb. Use a confidence level of 95% to complete parts (a) through (d) below. Part 1 a. Identify the critical value tα/2 used for finding the margin of error. tα/2 = Part 2 b. Find the margin of error. Part 3 c. Find the confidence interval estimate of Part 4 d. Write a brief statement that interprets the confidence interval.
The lifetime of a certain type of battery is known to be normally distributed with standard deviation o = 22 hours. A sample of 50 batteries had a mean lifetime of 120.1 hours. It is desired to construct a 95% confidence interval for the mean lifetime for this type of battery. ▬▬ Part 1 of 6 (a) What is the point estimate? The point estimate is 120.1 Part: 1 / 6 Part 2 of 6 (b) Find the critical value. The critical value is Skip Part Check Type here to search X 11 S I 81 17 hp fa Es Save For Later Submit Assi © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Ac (?) 55°F 10:36 F 3/28/2 10

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