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Teens were asked in the MTF 2006 survey how often they think about social issues (specific issues were not identified). The bivariate table includes responses organized by teen's race.
How often do you Race of Respondents
think of social issues? Black White Hispanic Total
Never 4 34 10 48
Seldom 23 201 26 250
Sometimes 95 459 97 651
Often 31 185 40 256
Great Deal 11 47 10 68
Total 164 926 183 1,273
Test the null hypothesis that race and thinking about social issues are independent (alpha - 0.05).
What do you mean by degrees of feedom in statistics? Explain the concept of degrees of freedom for each of the following hypothesis tests.
Give 99% confidence interval for mean number of years general managers of major-chain hotels have spent with their current company.
A random sample of 100 students at Southern University was collected. The mean age was found to be 24.2 years, with a standard deviation of 3.4 years.
What is the probability that at least one of the alterations is discovered? Find the expected value and variance of the number of altered accounts discovered during the audit.
Devise a method for estimating and plotting Bayesian credible regions for the paramters, using your MCMC sample and compute LS estimators of a and b,
Use the normal distribution of women's total cholesterol levels in Exercise 9 for which the mean is 186 milligrams per deciliter and the standard deviation is 37.2 milligrams per deciliter.
Sampling seventy-two percent of americans squeeze their toothpaste tube from the top. This and other not so serious finding are included in The first really important survey of american habits.
MoE's concessions manager believes the average amount that mall customers spend on food during a visit has increased over the historical average of $18.75, due to the opening of some new upscale restaurants in the mall. Use the data in the file to..
calculate the mean or expected value for the number of retransmissions and calculate the standard deviation for the number of retransmissions.
The researcher will then compare the scores for the two treatments. If there is a difference between the two groups of scores. Briefly explain how the difference simply may be sampling error.
Find the probability that in a given winter month fewer than 35 cars will be rented. (use the normal distribution to approximate the binomal distribution).
Before the rush began for Christmas shopping, a department store had noted that the percentage of its customers who use the store's credit card, the percentage of those who use a major credit card, and the percentage of those who pay cash are the ..
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