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1. An interesting marketing research effort has recently been reported, which incorporates within the variables that predict consumer satisfaction from a product not only attributes of the product itself but also characteristics of the consumer who buys the product. In particular, a regression model was developed, and found successful, regressing consumer satisfaction S on a consumer's materialism Mmeasured on a psychologically devised scale. For satisfaction with the purchase of sunglasses, the estimate of beta, the slope of S with respect to M, was b = -2.20. The reported t statistic was -2.53. The sample size was n = 54.7 Is this regression statistically signi?cant? Explain the ?ndings.
2. A regression analysis was carried out of returns on stocks (Y) versus the ratio of book to market value (X). The resulting prediction equation is Y = 1.21 + 3.1X (2.89) where the number in parentheses is the standard error of the slope estimate. The sample size used is n = 18. Is there evidence of a linear relationship between returns and book to market value?
How does the bell-shaped curve for the sampling distribution of sample means for samples of size n = 100 compare to the bell-shaped curve for sampling distribution of sample means for samples of size n = 60.
A first year medical school class (n = 200) took a first midterm examination in human physiology. The results were as follows (_X = 65, S = 7). Explain how you would standardize any particular score from this distribution, and then solve the follo..
the central limit theorem says that when a simple sample of size n is drawn from any population with mean ? and
Construct a 95% confidence interval estimate for the population proportion of adults who report that e-mails are easy to misinterpret.
Steve Goodman, production foreman for the Florida Gold Fruit Company, estimates that the average sale of oranges is 4,700 and the standard deviation is 500 oranges. Sales follow a normal distribution.
a recent study focused on the amount of money single men and women saved monthly. the information is summarized below.
the data in this question come from from sen and srivastava exercise 2.12 2 and can be used to model car ownership
a manufacturer claims that its televisions have an average lifetime of at least five years 60 months with a population
Calculation of Correlation and Regression for GAP
The ancient Greeks thought that the most pleasing shape for a rectangle was one for which the ratio of the length to the width was 8 to 5, the golden ration.
Calculate the mean and standard deviation of the following distribution. Find mean deviation and its coefficient of the following series.
The quality-control inspector checks 200 pieces in a certain operation. The piece is either good or defective. The record for nine hours.
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