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A professor teaches two sections of an introductory statistics course. He gives each section the same final and wonders if any significant differences exist between the medians of these sections. He randomly draws a sample of seven scores from Section A and six scores from Section B.
a. Set up the hypotheses to test the claim that the median test score in Section A differs from the median test score in Section B.
b. Calculate the value of the test statistic W.
c. With α = 0.05, what is the decision rule?
d. Do the median test scores differ? Explain.
In recent year, of the 109,857 arrest fro federal offenses, 29.1% were for drug offenses. Use a .01 significance level to test the claim that the drug offense rate is equal to 30%.
What is the probability that the person tests positive and has been exposed to tuberculosis?- What is the probability that the person tests positive?
Your instructor will now provide the data from all teams. Using a graphing calculator or computer, construct dot plots of the sample proportions for each sample size.
Roulette Marti decides to keep placing a $1 bet on number 15 in consecutive spins of a roulette wheel until she wins.
Provide an appropriate response. Suppose you pay $3.00 to roll a fair die with the understanding that you will get back $5.00 for rolling a 1 or a 6, nothing otherwise. What is your expected value?
one person has 3 dollars to gamble each time he uses only one dollar the probability is 60 to lose and 40 to win. if he
the weights of men are normally distributed with mean of 173 lb and a sd of 30 lb. suppose we choose a random sample of
If they each reported a sample percentage, what do you expect that the graph of those percentages would look like?
The first requires 60 sq. inches of material and the second requires 100 square inches. The company has 1,000 sq. feet of material. what is the model?
Three HIV treatments were tested for their effectiveness in preventing progression of HIV in children. Of 276 children given drug A, 259 lived and 17 died. Of 281 children given drug B, 274 lived and seven died.
assume that womens heights are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches.
If the value of σ may be anywhere between 0.010 and 0.020 inch, tabulate the minimum sample size required for σ values from 0.010 to 0.020 inch.
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