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Test whether the average patient should pay no more than $250.
An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of-pocket patient billing above the reimbursed amount was $275.66 with a standard deviation of $78.11. (a) At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule (b) Is this a close decision?
The times needed to fall asleep are assumed to follow a normal distribution. The results for the two nights for the ten volunteers are shown below:
If the basket ball player is a 74% free throw shooter, then, on average, how many free throws will he or she make in a game with eight free throw attempts?
a) Find the marginal density of Y. b) Find E(X) HINT: What is E (X|Y=y) ?
By using significance level a = .05, and suppose a normal distribution what does evidence conclude?
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By using 0.05 level of significance, is there any evidence of difference in mean life of bulbs produced by two kinds of machines?Calculate p-value and interpret its meaning.
Based on this information, by what factor does the risk of having an accident increase due to driving while intoxicated?
Find the expected value of the number of tests taken.
What is the expected value and variance for the number of contacts in eight attempts?
At.02 significance level is it sensible to conclude that mean number of shoes sold at mall stores is larger than at outlet stores?
For what proportion of patients will drug be effective for between 2 and 2.25 hours?
In healthy adults, x is approximately normally distributed with mean µ = 38 and standard deviation σ = 12. What is the probability that:
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