A city recently launched a neighborhood watch program to control crime. The following table gives the number of crimes reported insix neighborhoods during the six months before and six months after the city launched the neighborhood watch program.Before AfterO 3.365O 3.747577349717939416528736132Let the paired difference be the number of crimes before minus the number of crimes after the city launched the neighborhood watchprogram. The null hypothesis is that the mean of the population paired differences is equal to zero (i.e., the neighborhood watchprogram does not affect the number of crimes). The alternative hypothesis is that the mean of the population paired differences isgreater than zero (i.e., the neighborhood watch program decreases the number of crimes). The significance level is 1%.What are the critical values of t for the hypothesis test?

Given table is , Before After 574173654928717379613932Also given that ,Significance level , 1% =…

Answered: A city recently launched a neighborhood…

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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Asap e,f only with full explanation. a,b,c,d already answered.
South Dakota Connecticut Ohio Massachusetts 42 46 40 42 37 36 47 41 38 40 42 48 35 39 41 43 38 37 47 40 The table gives the ages of randomly chosen people from 4 different states At a = 0.10, determine whether there is a difference in mean ages. 1. The null hypothesis is Ho: O µ1 = µ2 = H3 = µ4 = H5 O µ1 = µ2 = H3 = H4 O µ1 = µ2 = H3 or 2. This is a right tailed test with: d.f.n = and d.f.d = 3a. The STS (to 2 decimals) is F = 3b. The P-value (to 3 decimals) is: 4a. At a = 0.10, the decision is: O Do not reject Ho O Reject Ho О Аcсеpt Ho О Аcсеpt Ha
Insurance componies track life expertancy info to assist in determining the cost of life insurance polocies. The insurance compony knows that last year the life expectancy of its polocy holders was 77 years. They want to know if their clients this year have a longer life expectancy, on average, so the company randomy samples some of the recently paid polices to see if the mean life expectancy of polcy holders has increased. Sample: 86,75, 83, 84, 81, 77, 78, 79, 79,81, 76, 85, 70,76, 79,81, 73, 74, 72, 83. 1) Does this sample indicate that the insurance company should change its premiums because life expectancy has increased? 2) For more accurate cost determination, the insurance companies want to estimate the life expectancy to within one year with 95% confidence. How many randomly selected records would you need to have?
800 700 600 500 400 300 200 100 5 10 15 20 25 30 Twenty five high school students complete a preparation program for taking the SAT test. Here are the SAT scores from the 25 students who completed the SAT prep program: 34 457 53 720 400 484 610 641 425 454514 499 64 501 625 2 471 598 509 531 The mean of these scores is 536.00. We know that the population average for SAT scores is 500 with a standard deviation of 100. Using the scatterplot above, are there any outliers?
14. Sports Car: Fuel Injection The manufacturer of a sports car claims that the fuel injection system lasts 48 months before it needs to be replaced. A consumer group tests this claim by surveying a random sample of 10 owners who had the fuel injection system replaced. The ages of the cars at the time of replacement were (in months): LEGO 29 42 49 48 53 46 30 51 42 52 (i) Use your calculator to verify that the mean age of a car when the fuel injection system fails is x = 44.2 months, with standard deviation S=8.61months. (ii) Test the claim that the fuel injection system lasts less than an average of 48 months before needing replacement. Use a 5% level of significance. %3D
A local bookstore arranges book counter in different schools around the year. The CEO says that, compare to last year, the number of orders received in school has been dropped this year. The table below shows the number of orders received in a random sample of 14 schools in this year and last year. School 1 3 4 6. 8. 9. 10 11 12 13 14 This year 85 35 96 45 33 52 67 77 45 67 43 76 80 65 Last year 92 38 93 81 42 50 61 89 56 63 49 65 92 81 Test, at 5% level of significance, is there sufficient evidence to conclude that the CEO's statement is correct. (The test report must include (i) null hypothesis and alternative hypothesis, (ii) rejection region, (iii) calculation of test statistics, and (iv) conclusion.)
Given the data below, compute the Mean, Median, Mode, Variance, and Standard Deviation. for: Ungrouped Data 63 54 31 14 20 69 4 30 42 18 1000万744107 75 49 45 60 44 72 23 34 66 58 8 42 89 24 4 55 70 88 71 93 5 28 12 45 83 93 40 94 43 41 34 41 93 81 55 68 9 37 1 76 53 79 41 55 35 8 Upload your solution and answer in an excel file.
what is the median numebr of touchdowns
Presidents, Popes, Monarchs Listed below are numbers of years that U.S. presidents, popes, and British monarchs lived after their inauguration, election, or coronation, respectively. Assume that the data are samples randomly selected from larger populations. Test the claim that the three samples are from populations with the same median.
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