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A large industrial firm uses 3 local motels to provide overnight accommodations for its clients. From past experience it is known that 20%: of the clients are assigned rooms at the Ramada Inn, 50% at the Sheraton, and 30% at the Lake view Motor Lodge. If the plumbing is faulty in 5% of the rooms at the Ramada Inn, in 4% of the rooms at the Sheraton, and in 8% of the rooms at the Lakeview Motor Lodge, what, is the probability that
(a) A client will be assigned a room with faulty plumbing?
(b) A person with a room having faulty plumbing was assigned accommodations at the Lakeview Motor Lodge?
Suppose a random sample of 20 tax returns from small business is examined. What is the binomial probability that at least one tax return involves fraud?
Determine if there is any diff erence between the pulse rates of smokers and nonsmokers. Compute the p-value of the test. Can you draw any conclusions?
a.There is less than 7 beds per house in Compton; Decision in to reject the null hypothesis b. 30 % of Americans go to church on Sundays. Decision is not to reject the null hypothesis
Determine payback period for implementing Oracle Discoverer? Assume that WebFocus will be in-place until December 31 and the migration to Oracle will be done concurrently and is expected to be completed and operational by Dec 31 as well.
LSAT scores are normally distributed, with a mean of 150 and s = 10.
Arbitron Media Research Inc, conducted a study of the radio listening habits of men and women. One facet of the study involved the mean listening time. It was discovered that the mean listening time for men was 35 minutes per day.
Prove that a and b are coprime if and only if no prime numbers divides both a and b. Show that [a,m] = m if and only if a divides m
The chance that all 50 residents in a neighborhood end up being the sample of residents selected is: the population of the suburb divided by 50.
A researcher is testing the effect of a new cold and flu medication on reaction time. A sample of n = 9 students is obtained and each student is given the normal dose of the medicine.
What could Bristol Myers have done to improve the validity of the results after they had mailed the 10,000 surveys and received 1,983 back? Assume they kept record of who had responded and who had not.
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Compute the standard error of the proportion.
Sampling Distribution for mean
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