Find the standard deviation, s, of sample data summarized in the frequency distribution table given below by using the formula below, where x represents the classmidpoint, f represents the class frequency, and n represents the total number of sample values. Also, compare the computed standard deviation to the standard deviationobtained from the original list of data values, 9.0.E(r+x?)|-[E"•x)]²n(n- 1)Interval20-2627-3334-4041-4748-5455-61entsFrequency4194024Standard deviation =(Round to one decimal place as needed.).cesspeca LibraryOntions

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Answered: Find the standard deviation, s, of…

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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A sample has a mean of M=60 and a standard deviation of s=7. For this sample, find the z-score for each of the following X values. x=69 x=54 x-72 x=49 x=63 x=52
a population of scores has u=44. in this population a score of x=40 corresponds to z = -1.00. What is the population standard deviation?
For a sample with a standard deviation of s=4, a score of X=35 corresponds to Z= -1.25. what is the sample mean?
The accompanying table contains historical data on staff salaries (in dollars per pupil) for 30 schools sampled in part of a country in the early 1970s. I've already found that the sampling mean is 2.8993 and standard deviation is 0.5531
For samples of the specified size from the population described, find the mean and standard deviation of the sample mean x. do The National Weather Service keeps records of rainfall in valleys. Records indicate that in a certain valley, the annual rainfall has a mean of 78 inches and a standard deviation of 10 inches. Suppose the rainfalls are sampled during randomly picked years, and x is the mean amount of rain in these years. For samples of size 25, determine the mean and standard deviation of x. OH=2; 0,=78 OH=78; 0,=10 OH=10; 6,=78 OH=78; o,=2 Submit Assignment Continue O 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center Accessibility MacBook Air 888 DII D esc F11 F12 F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 @ # $ & * 1 3 4 7 8. 9.
An SRS of 25 recent birth records at the local hospital was selected. In the sample, the average birth weight was x = 119.6 ounce Suppose the standard deviation is known to bes = 6.5 ounces. Assume that in the population of all babies born in this hospital, the birth weights follow a Normal distribution, with mean m. Based on the 25 recent birth records, the sampling distribution of the sample mean x can be represented by: a. N(119.6, 1.30). b. N(119.6, 6.5). O c. N(m, 1.30). O d. N(m, 6.5).
For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 34 beats per minute, the mean of the listed pulse rates is x=72.0 beats per minute, and their standard deviation is s=13.8 beats per minute. a. What is the difference between the pulse rate of 34 beats per minute and the mean pulse rate of the females? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the pulse rate of 34 beats per minutes to a z score. d. If we consider pulse rates that convert to z scores between −2 and 2 to be neither significantly low nor significantly high, is the pulse rate of 34 beats per minute significant?
Use the formula to find the standard error of the distribution of differences in sample means, I1 – X2. Samples of size 110 from Population 1 with mean 82 and standard deviation 14 and samples of size 80 from Population 2 with mean 76 and standard deviation 17 Round your answer for the standard error to two decimal places. standard error = i
For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 38 beats per minute, the mean of the listed pulse rates is x=79.0 beats per minute, and their standard deviation is s=22.1 beats per minute. a. What is the difference between the pulse rate of 38 beats per minute and the mean pulse rate of the females? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the pulse rate of 38 beats per minutes to a z score. d. If we consider pulse rates that convert to z scores between −2 and 2 to be neither significantly low nor significantly high, is the pulse rate of 38 beats per minute significant?
Use the formula to find the standard error of the distribution of differences in sample means, ₁ - ₂. Samples of size 35 from Population 1 with mean 3.1 and standard deviation 1.8 and samples of size 35 from Population 2 with mean 2.0 and standard deviation 1.4 Round your answer for the standard error to two decimal places. standard error = i
Use the formula to find the standard error of the distribution of differences in sample means, ₁ - ₂. Samples of size 23 from Population 1 with mean 6.5 and standard deviation 3.4 and samples of size 40 from Population 2 with mean 7.9 and standard deviation 6.6 Round your answer for the standard error to two decimal places. standard error = PI
The following is a sample of sanitation scores for 20 cruise ships. Find the mean and standard deviation of the sanitation scores. 1. The mean of the sample data is (round your answer to 2 decimal places) 2. The standard deviation of the sample data is (round your answer to 2 decimal places) 3. Calculate the intervals x¯±s,x¯±2s,x¯±3s. (Round your answer to two decimal places) A. (x¯−s , x¯+s) = B. (x¯−2s , x¯+2s) = C. (x¯−3s , x¯+3s) =

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