The 95% C.I. is calculated as 95% C.I. = X ± 1.9602and theg299% C.I. is calculated as 99% C.I.= X ± 2.57How will happen the Confidence Interval change when it is increasedfrom 95% to 99% using the same sample.A. Widens with the same centre.B. Narrows with different centres.C. Same range with different centres.D. Widens with different centres.А. АВ. ВС. СD. D

Given : The 95% confidence interval (C.I) is given as : X¯±1.96σ2n The 99% confidence interval (C.I)…

Answered: The 95% C.I. is calculated as 95% C.I.=…

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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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.
In the following Table are gradients for eight female teeth and eight male teeth. These numbers are measures of the rate of change in the amount of X-ray penetration through a 500-micron section of tooth enamel at a wavelength of 600 nm as opposed to 400 nm. Find the 95% confidence interval for lx - ly. Hint(to.025,14 =2.1448) Male Xi 4.9 5.4 4.8 5.3 5.0 5.5 5.4 6.6 6.3 4.3 Female y; 3.7 4.1 5.6 4.0 3.6 5.0
One company recently conducted a survey in which 420 women and 420 men were asked "Are you satisfied with the work of the Minister of Health?". Of these, 155 men and 118 women said they were satisfied with the minister's work. Assume that the experimental design was correct. Questions 1 and 2 cover this survey. 1. Find the upper limit of 95% confidence interval for the difference in the proportion of men and women who are happy with the work of the Minister (let men be group 1). 1. 0.03. 2. 0.09. 3. 0.15. 4. It is not possible to apply a normal approach and therefore we can not calculate the confidence interval. 2. What is the rejection area if it is to be examined whether the proportion of men and women who are satisfied with the job of Prime Minister is different (use a = 0.05)? 1. RejectHO efz 1.96. 2. Reject HO if z> 1.64. 3. RejectHO efz> -1.96 or <1.96. 4. Insufficient information provided to answer this.
Determine whether the following statements are True or False: In a confidence interval (CI) for a population mean, the margin of error (MOE) is half the width of the CI. If we constructed 1000 independent 90% CI’s for a population mean µ, thenwe’d expect about 900 of them to contain µ If we increase the sample size of SRS’s, then the width of the CI’s corresponding to the SRS’s decreases, i.e., the CI’s become narrower
6.2.3 Find the critical value t, for the confidence levelc=0.99 and sample size n= 12. Click the icon to view the t-distribution table. (Round to the nearest thousandth as needed.)
Q7. The 95% C.I. is calculated as 95% C.I.= X ± 1.96 and the п 99% C.I. is calculated as 99% C.I.= X ± 2.57 How will happen the Confidence Interval change when it is increased from 95% to 99% using the same sample. A. Widens with the same centre. B. Narrows with different centres. C. Same range with different centres. D. Widens with different centres. О А. А ОВ. В С. С O D. D
A simple random sample with n = 52 provided a sample mean of 24.0 and a sample standard deviation of 4.6. a. Develop a 90% confidence interval for the population mean (to 1 decimal). b. Develop a 95% confidence interval for the population mean (to 1 decimal). c. Develop a 99% confidence interval for the population mean (to 1 decimal). d. What happens to the margin of error and the confidence interval as the confidence level is increased? V - Select your answer - They increase They decrease They stay the same It cannot be determined from the given data The margin of error increases and the confidence interval becomes narrower The margin of error decreases and the confidence interval becomes wider
If n=21, ¯xx¯(x-bar)=39, and s=7, construct a confidence interval at a 99% confidence level. Assume the data came from a normally distributed population of which standard deviation is unknown.

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