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MATLAB: An Introduction with Applications

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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Question

The formula used to calculate a confidence interval for the mean of a normal population when n is small is the following.
x = (t critical value)
What is the appropriate t critical value for each of the following confidence levels and sample sizes? (Round your answers to two decimal places.)
(a) 90% confidence, n = 17
(b) 90% confidence, n = 13
(c) 99% confidence, n = 24
(d) 90% confidence, n = 23
(e) 80% confidence, n = 13
S
VA
n
(f) 95% confidence, n = 9

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SAT scores are distributed with a mean of 1,500 and a standard deviation of 300. You are interested in estimating the average SAT score of first year students at your college. If you would like to limit the margin of error of your 95% confidence interval to 25 points, how many students should you sample? 554 553 556 O 557
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What is this answers ??
Use technology to construct the confidence intervals for the population variance o? and the population standard deviation o. Assume the sample is taken from a normally distributed population. c= 0.99, s= 37, n 20 The confidence interval for the population variance is (Round to two decimal places as needed.) The confidence interval for the population standard deviation is (Round to two decimal places as needed.)
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the distribution of scores on a standardized test is approximately Normal with standard deviation of σ = 21. If a sample of 135 students had a mean score of x¯ = 73.6, use this to find a 99% confidence interval for the mean score of all students on this test. We are 99% confident that the the mean score of students on this test was in the interval ______ to _____. What is the margin of error for your confidence interval? Margin of error =
please solve for the following
You intend to estimate a population mean with a confidence interval. You believe the population to have a normal distribution. Your sample size is 43.Find the critical value that corresponds to a confidence level of 90%
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Find the critical value t, for the confidence level c = 0.99 and sample size n = 12. Click the icon to view the t-distribution table. (Round to the nearest thousandth as needed.) View an example Get more help - Help me solve this
A statistics class is estimating the mean height of all female students at their college. They collect a random sample of 42 female students and measure their heights. The mean of the sample is 65.3 inches and the sample standard deviation is 5.4 inches. Find the 90% confidence interval for the mean height of all female students in their school? Assume that the distribution of individual female heights at this school is approximately normal. 1. The t value is 1.3025 2. The standard error has a value of -- 3. The margin of error has a value of 4. Find the 90% confidence interval for the mean height of all female students in their school

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