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A random sample of size 16 is selected from a normal distribution with a mean of 92 and a standard deviation of 11.Another random sample of size 12 is selected from another normal distribution which has mean of 88 and standard deviations 16. Find the probability that the difference between the sample mean.a)is more than 8.b)is less than by 18.
Critically discuss the auto-covariance function of a stationary time series and its basic properties.
A breakdown of the responses is shown in the accompanying table. Is there evidence at the 10% level to infer that the responses differ among the three groups of employees?
The article should include a margin of error and confidence interval. Discuss the subject matter in the article, and interpret the results and what the confidence interval and margin of error mean as they apply to the specific subject matter.
A silver dollar is flipped 100times, with the following results: Heads =57, tails=43. What test should be used to determine if this is a fair coin?
Correlation rule states that if X and Y are correlated, X has caused Y.
A professor wants to conduct a study to know whether the grades she gives to her students affect their evaluations of her. She teaches four classes of ten students each.
Complete the table and answer the following questions. Use the .05 significance level.
Discuss the advantages of non-parametric methods. As an educator, how would they be useful to you? In what situations would you use them?
Jared bets on the number 7 for each of 100 spins of a roulette wheel. Because P(7) = 1/38 he expects to win two or three times. What is the probability that Jared will actually win two or more times?
Is there evidence that the population mean amount is different from 8.17 ounces? (Use a 0.05 level of significance and determine the p-value and interpret its meaning.
Computing relative frequencies in a contingency table and a survey of a sample of 347 people is conducted. The survey's respondents are classified according to their political affiliation and their opinion on a bill.
A production process manufacturers alternators. On the average, 1% of the alternators will not perform properly when tested in the plant. When a large shipment of alternators is received at the plant
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