2. A statistician wanted to determine if the demographic variables of age, education, and income influence...
Using the Excel’s Regression Tool, develop the estimated regression equation to show how income (y annual income in $1000s) is related to the independent variables education (x1 level of education attained in number of years), age (x2 in years), and gender x3 dummy variable, 1= female, 0 = male. Develop the dummy variable for the gender variable first. Use the t test to test whether each of the coefficients obtained in part (a) are significant at .05 level of significance....
Use the following linear regression equation to answer the questions. x1 = 1.5 + 3.4x2 – 8.3x3 + 2.3x4 (a) Which variable is the response variable? Which variables are the explanatory variables? (b) Which number is the constant term? List the coefficients with their corresponding explanatory variables. constant? x2 coefficient? x3 coefficient? x4 coefficient? (c) If x2 = 1, x3 = 8, and x4 = 6, what is the predicted value for x1? (Use 1 decimal place.) (d) Explain how...
The data below contains mileage, age, and selling price for a sample of 33 sedans. Price Mileage Age Price Mileage Age Price Mileage Age 16,998 35,000 11,599 95,000 18,998 20,000 2 17,599 16,000 3 9,499 123,000 8 12,599 63,000 7 15,998 42,000 3 14,599 54,000 5 12,599 70,000 15,998 60,000 4 10,599 68,000 10 10,998 88,000 10 11,599 102,000 16,998 40,000 4 11,998 86,000 6 12,998 109,000 4 20,998 7,000 11,998 60,000 6 14,998 60,000 11,599 80,000 9 17,599 45,000...
What is the relationship between the amount of time statistics students study per week and their test scores? The results of the survey are shown below. Time 13 10 9 9 2 10 12 8 Score 84 83 90 76 74 86 99 85 x-values y-values Find the correlation coefficient: r=r= Round to 2 decimal places. The null and alternative hypotheses for correlation are: H0:H0: ? r ρ μ == 0 H1:H1: ? μ ρ r ≠≠ 0 The p-value is: (Round to...
What is the relationship between the amount of time statistics students study per week and their test scores? The results of the survey are shown below. Time 16 14 15 6 14 15 6 Score 100 89 100 68 99 100 78 x-values y-values Find the correlation coefficient: r=r= Round to 2 decimal places. The null and alternative hypotheses for correlation are: H0:H0: ? ρ r μ == 0 H1:H1: ? μ r ρ ≠≠ 0 The p-value is: (Round to four decimal...
#1 #2 #4 only dont do #5 12 & 13 Country Austria 27.8 22.3 44.8 6.8 1.6 10.7 7.4 22.8 35.5 27.2 30.1 50.1 29.0 50.3 35.9 33.8 Netherlands Russia United States Source International Social Survey Programme, 2000. Regression and Correlation 467 For a variety of reasons, a larger percentage of people are concerned today about the state of the envi- ronment than in years past. This has led to the formation of environmental action groups that attempt to alter...
Question Cont'd X 1 2 0.0 Most restaurants offer free refills for its customers who purchase a fountain soft drink. A certain buffet restaurant currently doesn't. But, it has been argued that customers who drink more soft drinks tend to eat less and, thus, cost the restaurant less for the meal the customer eats. To test this argument, this restaurant offered free refills to a sample of 6 of its customers. The total number of glasses each customer drank, X,...
1. Many companies use a incoming shipments of parts, raw materials, and so on. In the electronics industry, component parts are commonly shipped from suppliers in large lots. Inspection of a sample of n components can be viewed as the n trials of a binomial experimem. The outcome for each component tested (trialD will be that the component is classified as good or defective defective components in the lot do not exceed 1 %. Suppose a random sample of fiver...
________________ ________________ ______________ 11. Using Excel - Scatter diagrams, estimated regression equations, and trendlines Suppose a company records data on sales calls, induding the length of each call and whether a sale was made. The manager is interested in determining whether there is a relationship between the average time spent per call and the number of sales made by each employee, so she obtains the average call length and the total number of sales over a 2-week period for a...
Article Summary I Read the article below and provide feedback by writing a 2 page summary. Please write in essay format (you may include the questions but the response should be in essay format) Must include the following information Title of the article Author(s) of the article Reference list (include the article itself and any other reference material such as another article that is cited in your summary). Use the reference list in the article to get information about another...