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A survey shows that 10% of the population is victimized by property crime each year. A random sample of 527 older citizens (65 years or more of age) shows a victimization rate of 14%. Are older people more likely to be victimized? Conduct both one- and two-tailed tests of significance.
If it is assumed that the probability distribution for the number of room rentals forms a normal distribution, what is the probability that on a given night?
suppose we draw k cards out of a deck. what is the probability that we do not draw an ace? is the answer larger or
The mean gross annual incomes of certified plumbers are normally distributed with the mean of $36,000 and a standard deviation of $3,572. The ship building association wishes to find out whether this number is still accurate.
How does a hierarchy of materials or subject differ in African cultures compared to Western cultures? How do African cultures differ from Western cultures in their assessment of "fine art" as opposed to "craft"?
At the 10% level of significance, does the following sample evidence indicate that the two population means are equal? Assume the populations are normally distributed.
We know that for a probability distribution function to be discrete, it must have two characteristics. One is that the sum of the probabilities is one.
For each of the examples below, decide if X is a binomial random variable. If so, specify n and p. If not, explain why not.
A social psychologist is studying college students attitudes toward drinking and driving. He is specifically interested in attitude change as a result of years in college and of viewing the consequences of drinking and driving accidents.
Systolic blood pressures are measured at baseline and again 4 weeks later. Compute a 95% confidence interval for the mean difference in blood pressure over 4 weeks.
A distributor receives a new shipment of 20 iPods. He draws a random sample of five iPods and thoroughly inspects the click wheel of each of them.
You are trying to determine the statistical significance of an equation. Given the following information, test the slope of the equation at the 90% level.
Describe multiple regression analysis and discuss potential uses for this model
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