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Regression and hypothesis testing

Fran's Mart are located throughout Erie, Pennsylvania, the owner would like to expand into other communities in northwestern Penn. and southwestern New York. As part of her presentation to the local bank, she would like to better understand the factors that make a particular outlet profitable. She must do all the work herself, so she will not be able to study all her outlets. She selects a random sample of 15 marts and records the average daily sales (Y), the floor space (area), the # of parking spaces, and the median income of families in that zip code region for each. The sample information is attached. a) Determine regression equation b) What is value of R2(squared)? Comment o... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

4414

OTA ID:

103059

Regression and hypothesis testing

A mortgage department of a large bank is studying its recent loans. Of particular interest is how such factors as the value of home (in thousands of dollars), education level of the head of household, current monthly mortgage payment (in dollars), and sex of the head of the household (male = 1, female = 2) relate to the family income. Are these variables effective predictors of the income of the household? A random sample of 25 recent loans is obtained (attached). a) Determine the regression equation b) What is value of R2(squared)? Comment on the value. c) Conduct a global hypothesis test to determine whether any of the independent variables are different from zero. d) Conduct... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

4415

OTA ID:

102454

Regression and hypothesis testing

Fred is the manager of human resources at St. Luke Hospital. As part of his yearly report to the president of the medical center, he is required to present an analysis of the salaried employees. Because there are over 1,000 employees, he does not have the staff to gather information on each employee, so he selects a random sample of 30. For each employee, he records monthly salary; service at St. Luke's, in months; sex (1 = male, 0 = female); and whether the employee has a technical or clerical job. Those with technical are coded 1, those with clerical are coded 0. File Attached. a) determine the regression equation, using salary as the dependent variable and the other four variabl... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

4417

OTA ID:

101733

Determining the probability from a given situation.

A chemical plant has an emergency alarm system. When an emergency situation exists, the alarm sounds with a probability of 0.95. When an emergency situation does not exist, the alarm sounds with a probability of 0.02. A real emergency situation is a rare event, with a probability 0.004. Given that the alarm has just sounded, what is the probability that a real emergency situation exists?

Subject:

Statistics

Topic:

All Topics

Posting ID:

4422

OTA ID:

103139

Statistics

Hypothesis testing questions

Subject:

Statistics