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The incomes in a certain large population of college teachers have a normal distribution with mean $75,000 and standard deviation $10,000. Sixteen (16) teachers are selected at random from this population to serve on a committee. What is the probability that their average salary is more than $77,500?
Let x be average number of employees in group health insurance plan and y be average administrative cost as percentage of claims. Determine sample correlation coefficient.
The null hypothesis is that the distribution of mother's educational level is the same for both treatment groups. The value of the chi-square statistic is 7.422. Evaluate the P-value
Among 100 people randomly chosen in a survey, exactly 10 stated that they believed that the elected representatives are honest most of the time.
an airline claims that 65 of its flights depart on time. a sample of 100 flights was examined and it was determined
the friendly neighbor grocery store has a single checkout stand with a full-time cashier. customers arrive randomly at
If 3 or fewer are defective, the lot is accepted. Based upon their sampling plan, what is the probability that a lot of 10 percent defective will be accepted?
Treating Chronic Fatigue Syndrome Patients with chronic fatigue syndrome were tested, then retested after being treated with fluorocortisone.
A thorough examination reveals that there is nothing wrong with the filling machine. From a statistical standpoint, was there a type error made? If yes, which type? Explain.
Suppose we sample five boys and five girls, and find that the average height of the boys is 0.5 inches more than the average height of the girls.
Brakes for a model of automobile fail with a Poisson distribution at an annual rate of 4.4/yr. What is the probability that
short answer writing assignmentall answers should be complete sentences.q1.when rolling a die is this an example of a
For any distribution the score that separates the highest 10% from the rest of scores is called.
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