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A husband and wife make their decisions independently of each other, and then they compare their decisions. If they agree, the decision is made; if they do not agree, then further consideration is necessary before a decision is reached. Assume each has a history of making the right decision 70% of the time.
What is the probability that they together make the right decision on the first try?
Uniformly distributed over the set of integers in the range [a, b], where a and b are integers with a
Is there any reasonable explanation for the two months that have the highest frequencies?
The student body of a large university comprises 60% female students. Elucidate what is the probability that the students in the sample exactly two are female?
A traffic study at one point on an interstate highway shows that vehicle speeds are normally distributed with a mean of 61.3 mph and a standard deviation of 3.3 mph.
An education expert is researching teaching methods and wishes to interview teachers from a particular school district. She randomly selects ten schools from the district and interviews all of the teachers at the selected schools.
Find values for the mean and variance of X. Using a distribution approximation, calculate the probability that there are more than 10 faulty disks in a box of 500 disks.
Formulate an appropriate statistical model, defi ning all the terms. State the null and two-sided alternative hypotheses which reflect the research question of interest.
Random sample from population of male runners in town or city. Create and interpret the 95% confidence interval for mean, mean of the population from which sample is drawn.
The variance of the return per share is 4 for stock 1 and 100 for stock 2. The covariance of the return between the two stocks is 5 per share. Use the total variance of the investment as investment risk.
During the development of the Chapin test, it was given to several different groups of people. Do these data support the contention that female and male students differ in average social insight at significance level = 0.1?
What is the city mileage standard deviation for this SUV model?
Visits to Web sites. What kinds of Web sites do males aged 18 to 34 visit most often? Pornographic sites take first place, but about 50 percent of male Internet users in this age group visit an auction site such as eBay at least once a month. Inte..
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