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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.
Compute variance, standard deviation, range, interquartile range, CV, and minimum and maximum Z scores. Are there any outliers? Explain.
An auditor for a large oil corporation has taken a random sample of monthly credit card charges for 32 individual (non-corporate) accounts.
Determine a 95% confidence interval for the true mean weight of such boxes?
Two samples of sizes 25 and 35 are independently drawn from two normal populations, where the unknown population variances are assumed to be equal.
Solve the equation x^2 + 8x - 2 = 0 using both-Write one paragraph describing which method you prefer and why.
It is reported that 45% of all college professors are extroverted. Suppose you have classes with six different professors. What is the probability that all six are extroverts?
If the probability distribution of X is: Determine the expected value of X? Find out the variance of X?
Standard deviation of 5 hours. What percentage of the bulbs have lifetimes that lie within one standard deviation of the mean on either side?
multiple choice question based on multiple regression.in a regression model involving 30 observations the following
If the sales are $150,000 per month, determine how much the company can expect to receive of this amount.
Given 7 male individuals in a Physical Education course, the number of sit ups each individual can do in a one minute period was recorded:
Explain why the t distribution is used as a part of the confidence interval.
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