TABLE 8.7.Number of days meetingan exercise goalCondition nMean St.Dev.Praise70 30.032.0Lottery70 35.029.9Get money70 36.029.4Lose money 71 45.030.1281 36.5Overall30.6865In exercise 8.22,1. A: Test each pairwise difference between themeans.2. B: Write up: What effects or combinations ofeffects are important., and what it means interms of the problem

A. The test statistic for comparing the pairs of groups is,

Answered: TABLE 8.7. Number of days meeting an…

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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C8. The GSS 2014 included a series of questions about what it takes to be a good citizen. Respondents were asked, to be a good citizen, how important was it "to help people in America who are worse off than yourself" (HELPUSA) and “to help people in the rest of the world who are worse off than yourself" (HELPWRLD). Answers were measured on a 7-point scale: 1 = not important at all to 7 = very important. We ran ANOVA models for each with respondent's political party (RPartyId) as the independent variable. Set alpha at .05 to assess the significance of each model. %3D Descriptives 95% Confidence Interval for Std. Deviation Mean Mean helpusa HOW IMPORTANT TO HELP WORSE OFF PPL IN AMERICA Std. Error Lower Bound Upper Bound 1.00 Democrat 167 6.15 Minimum Maximum 2.00 1.117 .086 5.98 6.32 Independent 87 5.94 1.214 .130 5.68 3.00 Republican 101 6.20 7 5.76 1.184 .118 Total 5.53 6.00 355 5.99 1.169 .062 helpwrld HOW IMPORTANT TO HELP WORSE OFF PPL IN REST OF WORLD 1.00 Democrat 5.87 6.11 166…
Comparing the three graphs below, which of the following statements are true? 1. The dotplot that has the greatest mean is Dotplot III. 2. For Dotplot I, the median is smaller than the mean. 3. The mode of Dotplot II is 5. Dotplot I 1 2 3 4 5 6 7 8 9 10 Dotplot III 1 2 3 4 5 6 7 8 9 10 1, 2, and 3 1 and 2 only 1 only 2 and 3 only 2 only Dotplot II 1 2 3 4 5 6 7 8 9 10
2. A real estate expert wanted to find the relationship between the sale price of houses and various characteristics of the houses. He collected data on five variables, recorded in the table, for 12 houses that were sold recently. The five variables are: Sale price of a house in thousands of dollars. Size of the lot in acres. Price: Lot Size: Living Area: Living area in square feet. Age: Type of house: town house (T) or Villa (V) Age of a house in years. Living Area Price Lot Size Age Туре of house 255 1.4 2500 8 T 178 0.9 2250 12 263 1.8 2900 127 0.7 1800 24 305 2.6 3200 10 164 1.2 2400 18 245 2.1 2700 9 146 1.1 2050 28 287 2.8 2850 13 189 1.6 2600 9 211 1.7 2300 8. 123 0.5 1700 11 a) Find the general regression equation b) Which independent variables are linearly related to price? c) How is the fit of the model? E BBBB BB>>}>> >{
Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with a particular landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project. For cost-estimating purposes, managers use two hours of labor time for the planting of a medium-sized tree. Actual times from a sample of 10 plantings during the past month follow (times in hours). 1.8 1.4 2.7 2.1 2.3 2.3 2.6 3.0 1.5 2.3 (c) Compute the sample standard deviation. (Round your answer to three decimal places.) (d) What is the test statistic? (Round your answer to three decimal places.) What is the p-value? (Round your answer to four decimal places.) p-value = (e) What is your conclusion? Do not reject H0. We can conclude that the mean tree-planting time differs from two hours. There is a reason to change from the two hours for cost estimating purposes. Reject H0. We can conclude that the mean…
Joan’s Nursery specializes in custom-designed landscaping for residential areas. The estimated labour cost associated with a particular landscaping proposal is based on the number of planting of trees, shrubs, and so on to be used for the project. For cost-estimating purposes, managers use two hours of labour time for the planting of a medium-sized tree. Actual times from a sample of 10 planting during the past month follow (times in hours). 1.7 1.5 2.6 2.2 2.4 2.3 2.6 3.0 1.4 2.3 Test to see whether the mean tree-planting time differs from two hours. Hyp: Dec Rule: Calculations: Conclusions:
4. What graphical display is the most suitable to show whether there is a relationship between the age of a person and the number of hours per week spent on exercising?
Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with a particular landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project. For cost-estimating purposes, managers use two hours of labor time for the plant- ing of a medium-sized tree. Actual times from a sample of 10 plantings during the past month follow (times in hours).2.1 2.2 1.7 1.6 2.3 3.1 1.5 2.6 2.4 2.2 With a .05 level of significance, test to see whether the mean tree-planting time differs from two hours. a. State the null and alternative hypotheses. b. Compute the sample mean. c. Compute the sample standard deviation. d. What is the p-value? e. What is your conclusion?
2.
4) The table shows, for the years 1997–2012, the mean hourly wage for residents of the town of Pity Me and the mean weekly rent paid by the residents. Mean hourly wage (dollars) Mean hour. Mean weekly rent (dollars) Mean weekly rent (dollars) Year Year (dollar 116 1997 57 10.38 2005 28.99 59 113 1998 10.89 2006 28.63 2007 1999 62 11.96 112 36.75 14.55 2000 63 12.46 2008 86 17.90 2001 86 17.72 2009 90 2002 2010 119 28.07 90 14.67 131 35.24 2003 2011 17.97 100 122 2004 2012 22.23 31.87 115 Find the least squares line that uses mean hourly wage to predict mean weekly rent. Round values to the nearest ten-thousandth. Include a scatter plot with the regression lino
C8. According to the Pew Research Center (2015), recent immigrants are better educated than earlier immigrants to the United States. The change was attributed to the availability of better education in each region or country of origin. The percentage of immigrants 25 years of age and older who completed at least high school is reported in this table for 1970 to 2013. Write a statement describing the change over time in the percentage who completed at least a high school degree. 1970 1980 1990 2000 2013 Mexico 14 17 26 30 48 Other Central/South America 57 53 60 66 Asia 75 72 75 82 84 48 68 81 87 95 Europe 36 48 52 58 72 Caribbean 81 91 88 85 85 Africa Source: Pew Research Center, Modern Immigration Wave Brings 59 Million to U.S., Driving Population Growth and Change Through 2065, 2015. Retrieved from https://www.pewresearch.org/hispanic/2015/09/28/modern- immigration-wave-brings-59-million-to-u-s-driving-population-growth-and-change-through-2065/ 52
Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with a particular landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project. For cost-estimating purposes, managers use two hours of labor time for the planting of a medium-sized tree. Actual times from a sample of 10 plantings during the past month follow (times in hours). 1.6 1.4 2.7 2.3 2.5 2.3 2.6 3.0 1.3 2.3 With a 0.05 level of significance, test to see whether the mean tree-planting time differs from two hours. (a) State the null and alternative hypotheses. H0: μ > 2,Ha: μ ≤ 2 H0: μ ≤ 2, Ha: μ > 2 H0: μ = 2, Ha: μ ≠ 2 H0: μ < 2, Ha: μ ≥ 2 H0: μ ≥ 2, Ha: μ < 2 (b) Compute the sample mean. (c) Compute the sample standard deviation. (Round your answer to three decimal places.) (d) What is the test statistic? (Round your answer to three decimal places.) What is the…
Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with a particular landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project. For cost-estimating purposes, managers use two hours of labor time for the planting of a medium-sized tree. Actual times from a sample of 10 plantings during the past month follow (times in hours). 1.6 1.5 2.6 2.3 2.3 2.3 (intel) CORE 15 HoiH 2 H:HS2 OHO: H≤2 H:H>2 ● H₁: H = 2 H:μ*2 O Ho: 422 H₂:μ< 2 2.6 3.0 (b) Compute the sample mean. 2.2 1.5 2.3 (c) Compute the sample standard deviation. (Round your answer to three decimal places.) (d) What is the test statistic? (Round your answer to three decimal places.) What is the p-value? (Round your answer to four decimal places.) p-value = (e) What is your conclusion? Do not reject Ho. We can conclude that the mean tree-planting time differs from two hours. There is a reason to change from the two…

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