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A study of consumer smoking habits includes 161 people in the 18-22 age bracket, 50 who smoke. There are 144 people in the 23-30 age bracket, 35 who smoke, and 80 people in the 31-40 age bracket, 28 who smoke. Organize this data into a table. If one person is randomly selected from this sample, what is the probability of getting someone who is in the 23-30 age brackets or whom smokes?
A confidence interval increases in width as:
Find the confidence interval for the mean price, μ, of all dealer sticker prices of new cars: for a confidence level of 90% in thousands of dollars:
A random sample of 48 managers of large hotels has mean X‾= 5.91. The null hypothesis for the researcher's test is?
Consider the following stemplot. The mean of the data represented in this stemplot ?
Survey on What do you think is the biggest problem facing education today. One problem with exit polls may be that the wrong "key precincts" were chosen.
Twelve doctor's offices were given 3 lab inspections with the following results:
Find the probability that the number of who consider themselves basketball fans is :
A manager of a large department store with three floors reports that the time a customer on the second floor must wait for an elevator has a uniform distribution ranging from 0 to 16 minutes. It takes the elevator 1 minute to go from floor to floo..
If you have a statistical package that computes binomial probabilities, find the probability that at least five funds outperform the market in all 10 years.
A bank's loan officer rates applicants for credit. The ratings can be described by a Normal model with a mean of 200 and a standard deviation of 50.
Here is a two-way table showing enrollment data for full-time undergraduate students in U.S. colleges and universities. The entries are thousands of students:
Let X be the number of yes votes obtained from a random sample of 200 out of the entire voting population. What is the expected value of X if, in fact, 65% of all voters supported the dictator?
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