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Consider a population of students and their final exam grades. Within this population a sample of 60 students and their final exam grades is considered. The average of the final exam grades for those 60 students is 82. Is this average a parameter or statistic?
Let X1, ..., Xn be i.i.d. with the Lebesgue p.d.f. ?x?-1I(0,1)(x), where ? > 0 is unknown.
What is the 99% confidence interval? What is the new critical value for this calculation?
We examine 100 sheets of photographic paper. Find the probability of 0 defects in one sheet.
An Auditor of a small bsuiness has sampled 50 of 700 accounts. The sample mean total receivables is $435, and the sample standard deviation is $86. Find a 95% confidence interval for the total amount of receivables.
The level of significance is quantitatively defined as ? and the statistical power of a test is quantitatively defined as 1-?
a pair of dice is rolled. find the probability of rollinga a sum not more than 4b a sum not less than 10c a sum between
Suppose that the number of men equals the number of women, and that Vera is last on the preference list of every man.- Prove that under every stable matching, Vera is matched to the same man. Who is the unlucky guy?
What are the null and alternative hypotheses? In what way do the two estimates of the defect rate in question 3g differ?
Refer to the box plot below to answer the questions. If a data point that was originally 13 is changed to 14, how would the box plot be affected?
Toss the coin four times. If the coin lands either all heads or all tails, reject Ho: p=1/2 (the p denotes the chance for the coin to land on heads.) Complete parts a and b. what is the probability of a type 1 error for this procedure
In one study of 71 smokers who tried to quit smoking with nicotine patch therapy, 32 were not smoking one year after the treatment. Use a 0.10 significance
1. A random sample of five observations is selected. The deviation scores for the first four observations are -5, 3, 1, and -2.
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