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An auditor for Health Maintenance services reports that 40 percent of policyholders 55 years or older submit a claim during the year. Fifteen policyholders are selected at random
a) how many of the policyholders would you expect to have filed a claim within the last year?b) what is the probability that 10 of the selected policyholders submitted a claim?c) what is the probability that 10 or more submitted a claim?d) what is the probability that more than 10 submitted a claim?
Faced with rising FAX costs, a firm issued a guideline that transmissions of 10 or more should bw sent by 2-day mail instead. Wxceptions are allowed, but they want the average to be 10 or below.
Test the hypothesis that the annual income of corporate trainers in areas of more then 500,000 are significantly more than those in areas of less than 100,000. Use the 5% level of risk.
What is the probability that the mean contents of a six-pack are less than 12 ounces and what is the chance I find at most two defectives in the sample
Analyze these data and summarize your findings for managers. Explain how information can be used by decision makers. Assume that sales per customer are normally distributed.
If there is relationship between parental income and SAT score, why can't we bring to a close that differences in score are caused by differences in parental income.
Food intake and weight gain. If we increase our food intake, we generally gain weight. Nutrition scientists can calculate the amount of weight gain that would be associated with a given increase in calories.
Psychologists wanted to test whether a certain accelerated class' IQ was different than average. There were 25 students in the class; their mean IQ score was 108.
Marks on statistics midterm test are normally distributed with mean of 78 and a standard deviation of 6. Determine the probability that class of 50 has average midterm mark that is less than 75?
The instructor wanted to "pass" anyone who scored above 69. What proportion of exams will have passing scores?
In a random sample of 150 freshman applications received thus far, 67 of the applicants request financial aid. Is there evidence that the proportion of next year's freshmen class needing financial aid has increased?
Determine the probability that Mary obtains exactly one Head.
Statewide real estate sales agency, Farm Associates, specializes in selling farm property in state of Nebraska. At.10 significance level, has there been an increase in selling time?
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