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Almost all U.S. light-rail systems use electric cars that run on tracks built at street level.According to the Federal Transit Administration, light-rail is one of the safest modes oftravel, with an accident rate of .99 accidents per million passenger miles as comparedto 2.29 for buses. The following data show the miles of track and the weekday ridershipin thousands of passengers for selected light-rail systems (USA Today, January 7, 2003).City Miles RidersLos Angeles 22 70San Diego 47 75Portland 38 81Sacramento 21 31San Jose 31 30San Francisco 73 164Philadelphia 69 84Boston 51 231Denver 17 35Salt Lake City 18 28Dallas 44 39New Orleans 16 14St. Louis 34 42Pittsburgh 18 25Buffalo 6 23Cleveland 15 15Newark 9 8a. Develop a scatter diagram for these data, treating the number of miles of track as theindependent variable. Does a simple linear regression model appear to be appropriate?b. Use a simple linear regression model to develop an estimated regression equationto predict the weekday ridership given the miles of track. Construct a standardizedresidual plot. Based upon the standardized residual plot, does a simple linear regressionmodel appear to be appropriate?c. Perform a logarithmic transformation on the dependent variable. Develop an estimatedregression equation using the transformed dependent variable. Do the model assumptionsappear to be satisfied by using the transformed dependent variable?d. Perform a reciprocal transformation on the dependent variable. Develop an estimatedregression equation using the transformed dependent variable.e. What estimated regression equation would you recommend? Explain.
The shelf and purchases it, and he later discovers that the lamp he purchased is defective. What is the probability that the defect came with the first shipment?
Weights are distributed normal with a mean of 132 pounds and a standard deviation of 27.4 pounds. In a random sample of 150, how many of them would be expected to weigh between 100 and 115 pounds?
Find out optimal assignment and calculate total minimum cost.
Do time series models rely heavily on cause and effect relationships between variables in order to ensure accurate predictions?
The data show that acreage owned per family is normally distributed with a mean of 10.0 acres and a standard deviation of 1.5 acres. Calculate the percentage of families that own at least 8.1 acres
A woman wrote to DearAbby and claimed that she gave birth 308 days after a visit from her husband, who is in the Navy. Lengths of pregnancies have a mean of 268 days and a standard deviation of 15 days
The borderline between low calcium levels and those not considered low. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.
How can you tell what are the solutions of a quadratic equation by looking at its graph? Explain.
The proportion of participants registering strong disapproval was 65%. At the 95% confidence interval and using a two-sided test, which of the following statements do these data support?
Formulating null and alternative hypothesis to test the claim averaging about $5000.
what will be the standard deviation of the share price if it is assumed that there is a 95% probability that the value will be at least 64?
A questionnaire will be published and the first 1000 completed questionnaires will be analyzed. Which of the following errors will be associated with the sample? Sampling errors only.
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