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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?
Find the moment generating function of their sum and identify the corresponding distribution, its mean and its variance.
Independent random samples were taken from normal distributions of the yearly production of ships built by the International Ship Building Company under (1) a fixed-position layout and (2) a project layout.
Compute mean x and standard deviation s of data above. Calculate Ho by using traditional/classical method.
If campaign can be expected to also to rise the probability of best case scenario to 0.4, is it a good investment.
Prove that there is a sequence of polynomials p_n on [0,1] such that p_n ----> 0 pointwise on [0,1] but the integral from 0 to 1 of p_n dx
Assume that a patient is believed to have one of two diseases, denoted by D1 and D2 with P(D1)=0.40 and P(D2)=0.60 and that medical research has determined the probability associated with each symptom that may accompany the diseases.
Discuss how a t test for a dependent variable can be of great value in applying a new approach to the treatment of aggressive behavior to a small group of students.
In a recent study of incomes in Allegheny county in Pennsylvania it was found that distribution of family incomes is skew to the right. what can we say about the relationship between mean and median?
Enrollment for the last four semesters had been 120, 126, 110, and 130. Develop a forecast of enrollment next semester.
In a distribution of sentence lengths in months like the following: 6, 12, 10, 18, 24, 360; which statistic would a researcher not want to report?
In our discussions of basic probability theory the concepts of mutually exclusive events and independent events share prominent roles. Please explain these concepts and in particular address the question
Printed circuit cards are placed in a functional test after being populated with semiconductor chips. A lot contains 140 cards, and 20 are selected without replacement for functional testing.
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