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A computer store has 10 copies of a word processing program, 12 copies of a spreadsheet program, and 8 copies of a draw program.
A student applies for two different scholarships. The probability of receiving the first scholarship is 0.3 and the probability of receiving the second is 0.4.
Let the random variable X be the number of lines busy. Find the probability distribution of X.
Arriving inductees first enter the Center’s Background Information room, which contains 5 computer terminals.
In how many ways can a subcommitee of 5 people be chosen so that at most one married couple belongs to the subcommittee?
Another family in the Federal Reserve study group borrowed $ 120,000 . The loan is to be repaid in 13 years at 12% interest , compounded annually.
The test of interest in this problem is the t-test for comparing two population means, the population mean hours worked last week for males and the population
The manager of a fast food restaurant determines that the average time that her customers wait for service is 2.5 minutes.
If you use a 0.10 level of significance in a (two-tail) hypothesis test, what is your decision rule for rejecting a null hypothesis
Complete the hypothesis test for all adults (men and women) by performing the following steps. Use a level of significance of a = 0.05
A couple has three children, assume the likelihood of a boy is the same as a girl-Event the children are girls: {GGG}
Is there a significant relationship between the death of infants by race and the cause of death?
Test of two means. You should select a hypothesis you are interested in testing and then use a test of two means to test this hypothesis.
A loaf of bread is normally distributed with a mean of 22 oz and a standard deviation of 0.5 oz. What is the probability that a loaf is more than 22.75 oz?
The manufacturer of Boston and Vermont asphalt shingles knows that product weight is a major factor in the customer's perception of quality
What is the probability that one of these resistors picked at random will have a resistance between 13.06 ohms and 15.06 ohms, inclusive?
Determine if occupation is independent of gender. Justify the answer with a probability calculation.
A clinical psychologist is treating 25 patients with clinical depression. She wants to find out whether these patients score differently
The number of dummy variables is the number of levels of the categorical variable less one because the one left out is quantified by the intercept.
Given that a person uses five or more prescriptions, determine the probability that the person is age 65 or older.
If a machine is not properly adjusted, the product resistances changes, the case where µ = 1050 ? (5% shift). What fraction is now rejected?
Determine the variance and standard deviation of the number of people who believed the country was in a recession.
In 1990, the average annual Medicare spending per enrollee was $3267; in 2003, the average annual Medicare spending per enrollee was $6883 (Money, Fall 2003).
When fitting a third order autoregressive model to the DJIA, what is the parameter estimate a3 for A3?
Foa, Rothbaum, Riggs, and Murdock (1991) conducted a study evaluating four different types of therapy for rape victims.