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1. Business admissions. An analyst at a business school's admissions office claims to have developed a valid linear model predicting success (measured by starting salary ($) at time of graduation) from a student's undergraduate performance (measured by GPA). Describe how you would check each of the four regression conditions in this context.
2. School rankings. A popular magazine annually pub-Used BMW prices, part 2. Use the advertised prices for BMW 840s given in Exercise 65 to create a linear model for the relationship between a car's Yearand its Price.
a) Find the equation of the regression line.
b) Explain the meaning of the slope of the line.
c) Explain the meaning of the intercept of the line.
d) If you want to sell a 1997 BMW 840, what price seems appropriate?
e) You have a chance to buy one of two cars. They are about the same age and appear to be in equally good condi- tion. Would you rather buy the one with a positive residual or the one with a negative residual? Explain.
Effect of the style (g=Gothic, r=Romanesque) on the total length (y) of English medieval cathedrals, accounting for nave height (x) in cathedral dataset from faraway package. Effect of density, age and weight on the percent body fat (brozek) in fat..
in a sample of 108 toddlers the average height was found to be 36.5 inches with a standard deviation of 1.1give a point
guidelines for the jolly blue giant health insurance company say that the average hospitalization for a triple hernia
peter the head of a survey organization is planning to do a survey to estimate the percentage of people who intend to
in the milk section of a self-service market there are 150 quarts 100 of which are fresh and 50 of which are a day
Group 2 data [ 141, 139, 172, 131, 150, 125. Assume normal distribution, with equal variance in the two groups and conclusion for a=0.05.
Explain and show exactly how you are getting the correct information from your data set and how you are computing the probabilty.
What would happen if the forest service agent took another sample of 31 trees? Would the slope change? Would the intercept change? What about a third sample of 31 trees?
From the test data, can we determine whether the oven has an effect on the cake's density? The null hypothesis should be: Oven has no effect on density.
a. Formulate the null and alternative hypotheses. b. Which statistical test would you use? Why?
facebook reports that the average number of facebook friends worldwide is 175.5 with a standard deviation of 90.57.
Carry out a hypothesis test to see if our belief can be supported. State the null hypothesis and the alternative hypothesis that we would use for this test.
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