4. Suppose that I calculate T-, the signed-rank statistic which adds up the ranks of the...
Wilcoxon signed-ranks test for method Services data of self-reported and measured his for d evidence to support the claim that there in med and measured heights of males aged 12-16. Use a =0.05 of Health and Human 12-16. Is there s om between sell reported 63 56 PS20556 742 65 Reported height 68 71 20 21 Measured height 679 699 BOA203 Differenced) Rank of Signed Rank 72 70.8 a. From the claim derive Ho and HD b. Fill up the...
6. A new app start-up claims that "no more than than 6% of the product reviews they receive are negative" but we suspect it is more. When examining a random sample of 2000 reviews, we find that 140 are negative Let p be the probability that a review is negative and let X, (i 1,.. ,2000) be the random variable that represents the ith review being negative (assume they are independent and identically distributed). (a) Identify an appropriate probability model...
Decide which Wilcoxon test (i.e. the Wilcoxon signed-ranks test or Wilcoxon Rank Sums test) should be used. Then test the claim. Exercise 5. Fuel octane. A researcher wants to know if the octane level in gasoline affects car mileage. 12 randomly selected cars are tested. 5 gallons of 87-octane gas is put in the tank and then the car is run until it runs out of gas. The same cars are then tested in the same way, except that 5...
Suppose we are interested in whether there is a dierence between the median numbers of hours spent each week by men and woman watching television. Two random samples were taken: the numbers of hours taken by men and women watching television are shown below. You are about to test the null hypothesis that there is no dierence in weekly television watching hours between men and woman. Men: 5 10 12 15; Women: 0 7 4 3 6 8 a) calculate...
A standard poker deck of 52 cards has four suits, (symbols C, H, S, and D) and thirteen ranks (symbols A, 2, 3, 4, 5, 6, 7, 8, 9, T, J, Q, and K). Every card in the deck has both a value and a suit.1 A poker hand is any set of 5 cards from the standard poker deck. There are some special hands in poker, and these have ranks (i.e. some are better, some are worse). From best...
(16 points) Suppose the breaking strength of plastic bags is a Gaussian random variable Bags from company i have a mean strength of 8 kilograms and a variance of 1 kg2; Bags from company 2 have a mean strength of 9 kilograms and a variance of 0.5 kg' Assume we check the sample mean X1o of the breaking strength of 10 bags, and use X1o to determine whether a batch of bags comes from company 1 (null hypothesis Ho) or...
need help Standard deviation 0.25 0.24 0.245 Size 25 30 A) The t statistic is -1.79;the researcher rejects the null hypothesisX B) The t statistic is -2.14; the researcher fails to reject the null hypothesis C) The t statistic is 1.79; the researcher rejects the null hypothesis x D) The t statistic is 1.04; the researcher fails to reject the null hypothesis E] The t statistic is-1.51; the researcher failsto reject the null hypothesis. 25. A fair coin is tossed...
I. IF we do not reject the null hypothesis when the alternative hnthsinthen we have made Type B error (b) Correct decision (e) Type I error (a) Type I1 error Use for Problems 2 and 3. The data below shows the top 10 teams' winning percentages (z) and powe ratings (u) for the 2013-2014 NCAA basketball season, according to vww.teasrankings.com bo 100.47 b 20.43 08330.694 2. Interpret the estimated slope of the line. (a) For a 1-game decrease in power...
Hi, I just need information about the way to start my exercice. I am not so sure... So this exercice is below and here's what I want to do: calculate both mean and both std for the two categories, then test H0 m1 = m2 and HA mi ≠ m2, calculate the t statistic and then a bilateral test ?? EXERCISE: A team of researchers has designed a camera to detect, more accurately, the presence of a cataract in the...
Hello, I really need help on problems 1-4 listed below for my practice set. I appreciate the help! 1. Which of the following is true with regard to a P-value? (More than one answer may be correct) a. The P-value is generated under the assumption that the null hypothesis is false. b. The P- value may never be negative. c. As the P-Value approaches 0 is it is less likely the null hypothesis will be rejected. d. In a left-tailed...