SUMMARY OUTPUT Regression Statistics Multiple R R Square Adjusted R Square 0.959 0.919 0.909 Standard Error 3.756 Observations 10.000 ANOVA df SS MS F Significance F Regression Residual Total 1.000 1,285.245 1,285.245 91.105 0.000 8.000 112.858 14.107 9.000 1,398.103 Coefficients itandard Erroi 7.995 t Stat P-value Lower 95% Upper 95% Lower 95.0% Upper 95.0% (1.591) 1.923 0.091 17.581 (1.591) 17.581 ntercept Years in College 4.157 12.675 1.328 9.545 0.000 9.613 15.737 9.613 15.737
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what is the value of intercept? how to interpret the meaning of intercept?
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- GreenLawns provides a lawn fertilizer and weed control service. The company is adding a special aeration treatment as a low-cost extra service option, which it hopes will help attract new customers. Management is planning to promote this new service in two media: radio and direct-mail advertising. A media budget of $3,500 is available for this promotional campaign. Based on past experience in promoting its other services, GreenLawns obtained the following estimate of the relationship between sales and the amount spent on promotion in these two media. S = −2R2 − 10M2 − 8RM + 18R + 34M where S = total sales in thousands of dollars R = thousands of dollars spent on radio advertising M = thousands of dollars spent on direct-mail advertising. GreenLawns would like to develop a promotional strategy that will lead to maximum sales subject to the restriction provided by the media budget. (a) What is the value of sales (in dollars) if $2,500 is spent on radio advertising and $1,000 is…The Bureau of Labor Statistics gathers data about employment in the United States. A sample is taken to calculate the number of U.S. citizens working in one of several industry sectors over time. Table 11.16 shows the results: Industry Sector 2000 2010 2020 TotalNonagriculture wage and salary 13,243 13,044 15,018 41,305Goods-producing, excluding agriculture 2,457 1,771 1,950 6,178Services-providing 10,786 11,273 13,068 35,127Agriculture, forestry, fishing, and hunting 240 214 201 655Nonagriculture self-employed and unpaid family worker 931 894 972 2,797Secondary wage and salary jobs in agriculture and private householdindustries 14 11 11 36Secondary jobs as a self-employed or unpaid family worker 196 144 152 492Total 27,867 27,351 31,372 86,590 Table 11.16 We want to know if the change in the number of jobs is independent of the change in years. State the null and alternative hypotheses and the degrees of freedom.Food deserts have become a particularly hot topic in the public health community as an explanation for a variety of negative health outcomes in disadvantaged areas. A researcher is interested in comparing the average shelf space provided by supermarkets, convenience stores, and corner stores in two different communities in order to address the growing concern for food deserts. Assume the following table reports the summary statistics for shelf space dedicated to fresh fruits and vegetables (meters) from SRSs of a variety of different stores that supply groceries from each community. Community Average shelf space for fresh fruits and vegetables (m) Sample standard deviation Sample size "Food desert" 13.7 2.4 12 Other community 89.4 14.6 14 A) Carry out the appropriate statistical test in order to determine if there is a significantdifference in mean shelf space between the two communities at the alpha level of 0.05. Assumeall conditions for the test are met. Do not assume…
- Several methods of estimating the number of seeds in soil samples have been developed by ecologists. An article gave the accompanying data on the number of seeds detected by the direct method and by the stratified method for 27 soil specimens. Specimen Direct Stratified 1 23 8 2 34 39 3 0 8 4 60 59 5 20 54 6 63 63 7 40 28 8 8 8 9 14 8 10 94 100 11 3 0 12 68 59 13 79 68 14 23 54 Specimen Direct Stratified 15 34 28 16 0 0 17 39 39 18 19 14 19 94 94 20 3 14 21 40 48 22 23 23 23 0 0 24 8 14 25 14 40 26 19 14 27 40 79 Do the data provide sufficient evidence to conclude that the mean number of seeds detected differs for the two methods? Test the relevant hypotheses using ? = 0.05. (Use ?direct − ?stratified.) Find the test statistic. (Round your answer to two decimal places.) t = Find the df. (Round your answer down to the nearest whole number.) df = Use technology to find the P-value. (Round your answer to four…23.Food deserts have become a particularly hot topic in the public health community as an explanation for a variety of negative health outcomes in disadvantaged areas. A researcher is interested in comparing the average shelf space provided by supermarkets, convenience stores, and corner stores in two different communities in order to address the growing concern for food deserts. Assume the following table reports the summary statistics for shelf space dedicated to fresh fruits and vegetables (meters) from SRSs of a variety of different stores that supply groceries from each community. Community Average shelf space for fresh fruits and vegetables (m) Sample standard deviation Sample size "Food desert" 13.7 2.4 12 Other community 89.4 14.6 14 23.Food deserts have become a particularly hot topic in the public health community as an explanation for a variety of negative health outcomes in disadvantaged areas. A researcher is interested in comparing the average shelf space…Chest Injury Rating Car Driver Passenger Car Driver Passenger 1 42 35 10 36 37 2 42 35 11 36 37 3 34 45 12 43 58 4 34 45 13 40 42 5 45 45 14 43 58 6 40 42 15 37 41 7 42 46 16 37 41 8 43 58 17 44 57 9 45 43 18 42 42 Generate test results (α = .01) using data analysis (EXCEL).
- 2. In the article “Case Adaptation Method of CaseBased Reasoning for Construction Cost Estimation in Korea” (J. Constr. Engr. Mgmt., 2012: 43–52) provided data on military barrack projects undertaken by the Korean Ministry of National Defense from 2004 to 2008. Two variables of interest were the floor area of a barrack and the corresponding cost (in $US). The corresponding data is given in the attached image: a. Construct stem and leaf displays of both floor area and cost. Explain it.b. Do the values of cost appear to be perfectly linearly related to the floor area values? c. Construct a scatterplot of the data. Does it appear that cost could be accurately predicted by the value of floor area? Explain reasoning.In a manufacturing plant a work center is a specific production facility that consists of one or more people and or machines and is treated as one unit for the purposes of capacity requirements for planning and job scheduling. If jobs arrive at a work center faster than they depart the work center impedes overall productions and is referred to as a bottleneck. The data below was collected by a plant manager for use in investigating a potential bottleneck work center. Construct a histogram for each data set. Do your histograms suggest that the work center may be a bottleneck? Explain. Number of Items Arriving at Work Center per Hour: 155 115 156 150 159 163 172 143 159 166 148 175 151 161 138 148 129 135 140 152 139 Number of Items Departing Work Center per Hour: 156 109 127 148 135 119 140 127 115 122 99 106 171 123 135 125 107 152 111 137 1612.Tuition Fees: The following table shows the average annual tuition and fees at private andpublic 4-year colleges and universities for the school years 2009-2010 through 2014-2015. Year Private Public2009-2010 31,448 15,0142010-2011 32,617 15,9182011-2012 33,674 16,8052012-2013 35,074 17,4742013-2014 36,193 18,3722014-2015 37,385 19,203a. Using 1 for 2009-2010, 2 for 2010-2011, and so on, find the linear correlationcoefficient and the equation of the least-squares line for the tuition and fees at private 4-year colleges and universities, based on the year. Don Honorio Ventura State University Pasig, Candaba, Pampanga MMW103: Mathematics in the Modern Worldb. Using 1 for 2009-2010, 2 for 2010-2011, and so on, find the linear correlationcoefficient and the equation of the least-squares line for the tuition and fees at public 4-year colleges and universities, based on the year.c. Based on the linear correlation coefficients you found in parts a and b, are theequations you wrote in parts…
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