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Use the level and power values for the paired t test and Wilcoxon signed-rank test given in Table 6.18 to answer the following questions:
a. Suppose a level .05 test is to be applied to a paired data set that has differences which are highly skewed to the right. Will the Wilcoxon signed-rank test's "actual" level or the paired t test's actual level be closer to .05? Justify your answer.
b. Suppose a boxplot of the differences in the pairs from a paired data set has many outliers, an equal number above and below the median. If a level a = .05 test is applied to the differences, will the Wilcoxon signed-rank test's "actual" level or the paired t test's actual level be closer to .05? Justify your answer.
A spokesman for a popular television game show claims that contestants on the show win an average of $1200. In a random sample, 35 contestants were questioned on the amount of money they had won in order to test the hypothesis.
What is the probability that more than 265 will be relieved of the nasal condition?
The amount of radioactive element R in grams present t years from now is given by the formula R = 10.9e-0.003t. How much of R is present initially?
They would like the margin of error of the 95% confidence interval for the proportion to be 0.05 or less. Use the guessed value p = 0.25 to find the required sample size.
(a) Find Pn, the probability that this customer is eventually served. (b) Find Wn, the conditional expected amount of time this person spends waiting in line given that she is eventually served.
Determine the least squares equation. According to this information, what are the estimated sales for 2005? Listed below is the net sales in $ million for Home Depot, Inc. and its subsidiaries from 1993 to 2002.
It is suspected that a random variable has a normal distribution with a mean of 6 and a standard deviation of 0.5. After observing several hundred values, we find that the mean is approximately equal to 6 and the standard deviation is close to 0.5..
a fair coin is tossed 10000 times. find a number m such that the chance of the number of heads being between 5000-m and
According to a recent study, 38% of all women will suffer a hip fracture because of osteoporosis by the age of 85. If six women aged 85 are randomly selected, what is the probability that a) None of them will suffer (or has suffered) a hip fractur..
Assume the random variable X is normally distributed with mean μ = 50 and standard deviation σ = 7. Compute the probability. Be sure to draw a normal curve with the area curve with the area corresponding to the probability shaded.
At the .05 significance level, can we conclude that the guideline is still reasonable?
you have made calculations to test scores from 50 students are from a normal distribution. you calculate the mean score
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