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Optimism and LongevityA cancer specialist from the Los Angeles County General Hospital (LACGH) rated patient optimism in 20- to 40-year-old male patients with incurable cancer in 1970. In 1990, the researcher examined hospital records to gather the following data:• Socioeconomic status (1-7 rating of occupation; higher ratings indicate higher levels of SES)• Age in 1970• Optimism in 1970 (1-100 rating, higher scores indicate higher levels of optimism)• Longevity (years lived after the 1970 diagnosis)Using the SPSS data file for Module 7 (located in Topic Materials), calculate a simultaneous multiple regression with SES, age, and optimism as the independent variables and longevity as the dependent variable.1. Do the independent variables correlate statistically significantly and practically with the dependent variable?2. Is collinearity between the independent variables a concern?3. What is the R and adjusted R-square for all independent variables entered simultaneously?4. What variable(s) provide a significant unique contribution(s)?5. Compose a results section for this statistical analysis.
Determine for each variable if it is the explanatory variable, the response variable, or whether it could be both.
At the time she was hired as a server, beth was told, "you can average more than $20 a day in tips." Over the first 35 days she was employed at the resturant, the mean daily amount of her tips was $24.85, with a standard deviation of $3.24.
What kind of correlation do you expect to find between annual income and amount spent on car? Will it be positive or negative?
The profit from each type of dealership, given the availability of gas is shown in the following payoff tableCompact Cars $300000 $150000. Construct a decision tree for the situation described above and indicate the best decision.
At least 14 units of B and no more than 20 units of A must be used. Each unit of A weighs 5 kg and each unit of B weighs 10 kg. How many units of each type of raw material requires?
Prof Hardtack gave three exams last semester in a large lecture class. The standard deviation = 7 was the same on all three exams, and scores were normally distributed.
The mean monthly demand for steam boilers is 6.8 with a standard deviation of 1.7. Compare the dispersion of these distributions. Which demand pattern has more relative variation? Explain.
Use a two-sample t-test within Minitab to test the hypothesis that the mean length of leaves on the north side is the same as the mean length of leaves on the south side.What do you conclude? (Show the Minitab output).
Perform the appropriate test for a difference in mean blood glucose and report the p-value for the two-tailed test of significance, assuming that the variances are equal.
testing for equality of variances.independent random samples were taken from normal distributions of the yearly
Suppose that it is a presidential election year and Ohio is one of the 'swing' states. Your polling company wants to conduct a presidential preference poll of the citizens of Ohio to predict which candidate will win the election.
A leasing firm claims that the mean number of miles driven annually, m, in its leased cars is less than 13280 miles. A random sample of 150 cars leased from this firm had a mean of 12584 annual miles driven.
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