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What is the value of A such that P(-A < T < A) = .90 for a T random variable with 16 degrees of freedom? Answer to three decimal places. Use Table II from the back of the text.
a random sample of 100 credit sales in a department store showed an average sale of 120.00. from past data it is known
alice pays bob a number of dollars equal to the sum of the values of any dice matching bobs guess. so for example
Of a random sample of 600 trucks at a bridge, 114 had bad signal lights. Construct a 95 percent confidence interval for the percentage of trucks that had bad signal lights.
a calculate the estimate for the standard error of difference between two independent means fornbsps12nbsp
Below are the sample times in minutes. At the .05 significance level, can we conclude that there is a difference in their mean times?
54% of men consider themselves professional baseball fans. You randomly select 10 men and ask if he considers himself a fan. Find the probability that the number who consider themselves professional fans is
let x have normal distribution with mean 11.3 and standard deviation 5.7.find the cumulative probability of 9.31 or
if 22 tickets are sold and 2 prizes are to be awarded find the probablilty that one person will win two prizes if that
Would the null hypothesis that the 2007 median household income was $50,000 be rejected at the 10% significance level in favor of the two-sided alternative? (Choose the correct answer)
What is the level of measurement for these items related to the newspaper business?
suppose x and y have joint density fxy e-xy for xy gt 0. find the distribution
Over the 48 years from 1950 through 1997, the stock market has gone up in the month of January for 31 times; it has gone up for the whole year for 36 times, and it has gone up both for the year and in January for 29 times.
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