Consider two populations of students. Both populations are the same size (1000). The first populationconsists of all students at a grade school (grades 1-5). The second population consists of all students ata middle school (grades 6-8). Which school's population is more likely to have a larger standarddeviation in the age of its students?a) The grade school's population is more likely to have the larger standard deviation.b) The middle school's population is more likely to have the larger standard deviation.c) They would most likely have the same standard deviation for age.a) It is impossible to say without more information.

Answered: Image /qna-images/answer/e34ba233-ad3c-49c9-8098-f27b3d18fb0e.jpg

Answered: Consider two populations of students.…

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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Five students took a self-confidence test. Their deviation scores were –4, +3, +1, –2, and +2. Assuming that these scores com form a normaldistribution, which deviation represents the highest raw score?
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12. (Two Samples) According to a survey, the mean price of gasoline in the United States was $1.20 per gallon in 1995 and $1.10 per gallon in 1994. (U.S. News & World Report, June 12, 1995). Suppose these means were based on random samples of 100 gasoline stations for 1995 and 120 gasoline stations for 1994. Also, assume that the sample standard deviations were $0.11 for 1995 and $0.10 for 1994. a. Construct a 98% confidence interval for the difference between the mean gasoline prices for 1995 & 1994. b. Test at the 1% significance level if the mean gasoline price was higher in 1995 than in 1994.
A developmental psychologist is interested in studying how long babies gaze at a photograph of a human face. To test this question, she shows a picture to a sample of six babies and records the length of their gaze in seconds. The data are as follows: 12, 17, 18, 20, 20, 29. Calculate the mean, median, mode, range, variance and standard deviation for the sample.
A. What is the standard deviation of this population? (2, 3, 6, 8, 11) B. What is the standard deviation of this sample? (3, 4, 5, 7, 8, 8, 9, 12)
What is the variance and standard deviation of the following data: 8, 12, 18, 40, 42, 45, 50, 51, 60, 69, 70
Two stores sell watermelons. At the first store the melons weigh an average of 22 pounds, with a standard deviation of 2.5 pounds. At the second store the melons are smaller. with a mean of 18 pounds and a standard deviation of 2 pounds. You take and SRS of 40 melons from the first store and SRS of 34 from the second store Find the mean of each sampling distribution
Find the mean and standard deviation of the following list of weights(in pounds) of boston terriers at a per store: 9,18,13,14,18,7,6,12,17,20 CS Scanned with CamScanner
Consider two data sets from sampled populations, one with a high standard deviation and one with a low standard deviation. All else being equal, which dataset would have a lower probability of a Type One error?
Compare the following two sample data sets: A: 5,4,6,3,6,7A: 5,4,6,3,6,7 B: 6,5,7,6,1,8B: 6,5,7,6,1,8 Which data set has the greater sample standard deviation, and which data set has the greater range? Use the calculator if needed. Select the answer that is completely correct. The sample standard deviation of set B is greater. The range of set A is greater. The sample standard deviation of set A is greater. The range of set B is greater. The sample standard deviation of set A is greater. The range of set A is greater. The sample standard deviation of set B is greater. The range of set B is greater.

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