having a mean equal to 21 and a standard deviation equal to 8. (a) Describe the shape of the sampling distribution of the sample mean x . Do we need to make any assumptions about the shape of the population? Why or why not? Normally distributed because the sample size is large (b)Find the mean and the standard deviation of the sampling distribution of the sample mean x. (Round your answer to 1 decimal place.) O no

having a mean equal to 21 and a standard deviation equal to 8. (a) Describe the shape of the sampling distribution of the sample mean x . Do we need to make any assumptions about the shape of the population? Why or why not? Normally distributed because the sample size is large (b)Find the mean and the standard deviation of the sampling distribution of the sample mean x. (Round your answer to 1 decimal place.) O no

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 standard deviation for the group of data items. 5, 6, 7, 7, 8, 9 The standard deviation is (Simplify your answer. Round to two decimal places as needed.)
Examples A population has a mean of 110 and a standard deviation of 6. A random sample of 20 measurements is drawn from this population. Describe the sampling distribution of the sample means by computing its mean and standard deviation. Steps Solution 1. Identify the given information. µ = 110, o = 6, and n=20 2. Find the mean of the sampling distribution. Use the property that ux_= µ. =110 3. Find the standard deviation of the sampling distribution. Use the property that "X = 1.3420 The grades of Senior High School learners in Statistics is normally distributed with mean of 84 and standard deviation of 2.75. If 45 samples consisting of 30 learners each are drawn from the population, what would be the expected mean and standard deviation of the resulting sampling distribution of the means? Steps Solution 1. Identify the given information. H = 84, o = 2.75, and n= 30 2. Find the mean of the sampling distribution. Use the property that ux_= µ. =84 3. Find the standard deviation of the…
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Shaded diagram.. 3. The random variable X has a normal distribution with mean 80 and standard deviation 6. Choose random samples of size 40 from this distribution. Let X be the random variable of sample means. (5) a. What is the distribution of X ? (5) b. What is the mean of X ? y
Use the Central Limit Theorem to find the mean and standard error of the mean of the sampling distribution. Then sketch a graph of the sampling distribution. The mean price of photo printers on a website is $227 with a standard deviation of $58. Random samples of size 22 are drawn from this population and the mean of each sample is determined. Question content area bottom Part 1 The mean of the distribution of sample means is enter your response here . Part 2 The standard deviation of the distribution of sample means is enter your response here . (Type an integer or decimal rounded to three decimal places as needed.) Part 3 Sketch a graph of the sampling distribution. Choose the correct answer below. A. 224 227 230Mean price (in $) x A bell shaped curve is over a horizontal x overbar axis labeled Mean price (in dollars) from 224 to 230 in increments of 1 and is centered on 227. B. -3 0 3Mean…
Length data for mussels collected at three different depths in dry lake. Calculate the mean and standard deviation for the mussels length data from each depth graph the men length and stander deviation for these data
Ch 8 FRQ ( The distribution of average speeds of the top 53 drivers in NASCAR is roughly symmetric, unimodal, and bell-shaped, with a mean of 184.8 mph and a standard deviation of 7.2 mph. In the space above, draw a Normal Curve, from z=-3 to z=+3. Draw vertical lines at the mean and each whole number standard deviation above and below the mean. Write two rows of numbers under the base line; one row with the number of standard deviations above and below the mean (z-scores), and a row under that with the actual values for this problem. ] What percent of drivers would you expect to have speeds below 199.2 mph ? Show all work. s] What is the area under the curve to the left of a speed of 170.4mph Show all work. What is the probability that a driver selected at random will have a speed below 172.0 mph ? Show all work. B] What percent of drivers would you expect to have a speed above 177.0 mph ? Show all work. How many drivers would you expect to have speeds between 170.4 mph and 177.0 mph…
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The coefficient of variation CV describes the standard deviation as a percent of the mean. Because it has no units, you can use the coefficient of variation to compare data with different units. Find the coefficient of variation for each sample data set. What can you conclude? Standard deviation CV 100% Mean Data Table A Click the icon view the data sets. CVneights = % (Round to the nearest tenth as needed.) Heights Weights CVweights = % (Round to the nearest tenth as needed. 69 188 65 177 What can you conclude? 74 210 76 208 O A. Weight is more variable than height. 80 173 O B. Height is more variable than weight. 67 203 76 170 66 225 70 218 65 204 72 183 74 209