You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = confident that your esimate is within 4 of the true population mean. How large of a sample size is required? 49.4. You would like to be 90% n = Do not round mid-calculation. However, use a critical value accurate to three decimal places -this is important for the system to be able to give hints for incorrect answers. Submit Question

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = confident that your esimate is within 4 of the true population mean. How large of a sample size is required? 49.4. You would like to be 90% n = Do not round mid-calculation. However, use a critical value accurate to three decimal places -this is important for the system to be able to give hints for incorrect answers. Submit Question

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 Z-score tells you the number of standard deviations away from the mean (and X-μ can be used to find the in what direction) a data value is. The formula: Z Z-score for a single member of the population. Notice X - μ tells you the signed distance the data value (X) is from the mean. When you divide that by the size of each chunk (the standard deviation) you are measuring the distance in units of the size of the standard deviations (how many standard deviations fit in the distance between the data value and the mean) - which gives you the Z-score. σ The formula X = μ+Z. can be used to find the value in the population when given the Z-score (signed number of standard deviations). Notice that Z. tells you how far from the mean the data value is (since Z is the number of standard deviations and is the size of each standard deviation the product tells the total distance). So adding the distance from the mean to the mean gives the location along the number line for the data value. A…
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