In a recent poll of 760 homeowners in the United States, one in five homeowners reports having a home equity loan that he or she is currently paying off. Using a confidence coefficient of 0.90, derive an interval estimat ...

Examine the history of American party politics from the Great Depression through the 1990s. Trace the evolution of the major political parties, their policies, and their constituencies during this period.

Suppose amongst all the families on a Caribbean Cruise, the population variance of the number of children per family is 4. If we were to take a sample of 10 families, then the probability is .9 that the sample variance i ...

1. If the independent variable has absolutely no effect on the dependent variable, will the means of the experimental conditions be the same? Why or why not? 2. An ANOVA for a oneway design partitions the total variance ...

1. The independent variable was whether the applicant appeared to have a disability. 2. The dependent variables were participants' ratings of the applicant (such as ratings of how qualified the applicant was, how much th ...

The average batter life of the iPhone 4S is reported to be 6.0 hours by Apple. Assume that the population standard deviation for the better life for this cell phone is 30 minutes. A random sample of 50 iPhones had an ave ...

1. How does the sample size influence the extent to which the sample data can be used to accurately estimate population parameters? 2. What statistics are used to indicate how accurately the sample data can predict popul ...

If the difference between two means is not statistically significant, how certain are you that the independent variable really does not affect the dependent variable?

You have been asked to evaluate the effects of a new educational video that was developed to reduce racial prejudice among adolescents. You plan to administer a pretest measure of racial attitudes to 60 adolescent partic ...

Researchers are interested in determining if men and women's hearts tend to be different sizes. In a sample of 12 males, the mean diameter of the heart was 13.21 cm with a standard deviation of 1.05. Among 9 females, the ...

