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For recent General Social Survey data, a prediction equation relating Y = whether attended college (1 = yes) to x = family income (thousands of dollars, using scores for grouped categories), m = whether mother attended college (1 = yes, 0 = no), f = whether father attended college (1 = yes, 0 = no), was logit[ ˆ P(Y = 1)] = -1.90 + 0.02x + 0.82m + 1.33f . To summarize the cumulative effect of the predictors, report the range of ˆp values between their lowest levels (x = 0.5, m = 0, f = 0) and their highest levels (x = 130, m = 1, f = 1).
Using significance level of 5%, can you say that NBA players are smarter than the average population? What is the value of the test statistic?
a researcher wishes to know with 98 confidence the percentage of women who wear shoes that are too small for their
Follow daily stock price quotations in the Wall Street Journal for a pair of stocks of your choice, and compute the sample correlation coefficient.
Is the slope coefficient in the linear regression model between temperature and fuel consumption statistically significant at alpha=.05 and 0.01? How do you know? Show your test.
625 males, 398 say they have gone to the dentist in the past year. Construct 90% and 95% confidence intervals for the population proportion.
allstate would like to test the hypothesis that the average age of an imported car on the road is greater than the
The correlation between his test and the BDI was r =.14. Evaluate this correlation. What does this correlation tell us about the relationship between these two instruments?
question the president of a company that manufactures drywall wants to analyze the variables that affect demand for his
The number of passengers arriving at an airport terminal average 1200 each hour. To process passengers (check in, take luggage, etc) take an average of 6 minutes each. There are 6 airport staffers processing passengers. How long is the average wait f..
Find the P-value that would be used to determine if the percentage of customers who prefer mint chocolate chip ice has increased at a 5% level of significance.
damon is a used car salesman in florida. the chance that he meets his monthly sales goals are as
A sample of size n = 14 is selected from a normal population to construct a 95% confidence interval estimate for a population mean. The interval was computed to be (7.82 to 9.64). Determine the sample standard deviation.
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