=The standard deviation for a population is o 14.6. A sample of 17 observations selected from this population gave a mean equal to143.05. The population is known to have a normal distribution.Round your answers to two decimal places.a. Make a 98% confidence interval for u.b. Construct a 95% confidence interval for μ.c. Determine a 90% confidence interval for μ.id. Does the width of the confidence intervals constructed in parts a through c decrease as the confidence level decreases?

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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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The standard deviation for a population is o = 15.2. A sample of 49 observations selected from this population gave a mean equal to 73.8. a. Make a 91% confidence interval for µ: b. Construct a 96 % confidence interval for u: c. Determine a 98 % confidence interval for u: d. A question for you to think about: how does the width of the confidence interval change as the confidence level increases? Note 1: Your confidence interval should be given in the format of (a, b) where a and b are two numbers. Note 2: Keep 2 decimal places in your confidence interval answers.
The following information is obtained for a sample of 80 observations taken from a population. SS = 390.124, se = 0.955, and ý = 164.13 – 2.55x Make a 97 % confidence interval for B. Round your answers to two decimal places. The 97 % confidence interval for B is ( i i ).
1 h 4. A fashion designer wants to know how many new dresses women buy each year. A sample of 650 women was taken to study their purchasing habits. Construct the 95% confidence interval for the mean number of dresses purchased each year if the sample mean was found to be 5.6. Assume that the population standard deviation is 1.3. Round your answers to one decimal place. Answer: Lower endpoint: Upper endpoint: iny ir
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Construct the confidence interval for the population mean μ. c=0.98, x=6.9, σ=0.6, and n=51
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