Use the following information to answer problems 13 and 14.Cholesterol levels among 14-year-old boys have an approximately Normal distribution with mean 170 mg/dl and standard deviation 30 mg/dl.You choose a simple random sample of 4 14-year-old boys and find the average of their cholesterol levels. If you do this many times, the mean of theaverage cholesterol levels in mg/dl you get will be close toO 170/√√4=84O 170/4 = 42.5O 170 You choose a simple random sample of 4 14-year-old boys and find the average of their cholesterol levels. If you do this many times, the standarddeviation of the average cholesterol levels in mg/dl you get will be close toO 30O 30/√√4-15O 4/√300.73do%J+8D8DIITJ12

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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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Mr. Jackson is looking at test scores for his Algebra 2 class. The scores on the Unit 2 Test follow a normal distribution, with a mean of 89 and a standard deviation of 3. What percent of learners scored 86 or better?
In this problem, assume that the distribution of differences is approximately normal. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value by a small amount and therefore produce a slightly more "conservative" answer. In the following data pairs, A represents the cost of living index for utilities and B represents the cost of living index for transportation. The data are paired by metropolitan areas in the United States. A random sample of 46 metropolitan areas gave the following information.
In this problem, assume that the distribution of differences is approximately normal. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value by a small amount and therefore produce a slightly more "conservative" answer. In the following data pairs, A represents the cost of living index for utilities and B represents the cost of living index for transportation. The data are paired by metropolitan areas in the United States. A random sample of 46 metropolitan areas gave the following information. Do the data indicate that the U.S. population mean cost of living index for utilities is less than that for transportation in these areas? Use α = 0.05. (Let d = A − B.) (a) What is the level of significance? (b)What is the value of the sample test statistic? (Round your answer to three decimal places.)
Suppose you are working with a data set that is normally distributed, with a mean of 250 and a standard deviation of 46. Determine the value of x from the following information. (d) x is greater than 57% of the values
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?
Suppose your manager indicates that for a normally distributed data set you are analyzing, your company wants data points between z=−0.6z=-0.6 and z=0.6z=0.6 standard deviations of the mean (or within 0.6 standard deviations of the mean). What percent of the data points will fall in that range?Answer: percent (Enter a number between 0 and 100, not 0 and 1 and round to 2 decimal places)
This is the data with questions.
Which of the following statements is NOT correct about effects of scale changes for a data set? O a. When a constant of 3 is multiplied with every score value, the variance will increase by 9 Ob. When a constant of 3 is added to every score value, the variance will not change c. When a constant of 3 is multiplied with every score value, the standard deviation will increase by 3 d. When a constant of 3 is added to every score value, the standard deviation will increase by 3
The next five questions refer to the following scenario: • sample mean T = 10 • sample size n = 100 • population standard deviation O = 4
4. A new method for cholesterol utilizing 4 - aminoantipyrine was evaluated in the laboratory. The procedure was run in on 20 separate days. The following values are given: Mean = 150 mg/dl Sum of the squared difference from the mean is 3600 Calculate the SD.
Why can’t the following mode predict 100% of the variability in the price of a used Corolla?
Given the mean and standard deviation of data set Y as 20 and 5, how can I find the mean and standard deviation of Y + 6? Question refers to chapter 16 problem 25 of Stats, Modeling the World, AP Edition, part B. Thanks so much!!

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