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1. Trauma and Metabolic Expenditure. Use a statistical computer package to verify the rank-sum and the Z-statistic obtained in Exercise 20. Is the p-value the same? (Does the statistical package use a continuity correction?)
2. Trauma and Metabolic Expenditure. Using the rank-sum procedure, find a 95% confidence interval for the difference in population medians: the median metabolic expenditure for the popu- lation of trauma patients minus the median metabolic expenditure for the population of nontrauma patients.
Suppose that the cars have been categorized according to whether the car needs warranty-related repair (yes or no) and the country in which the company manufacturing the car is based
The average cost of a renting a compact size car in a major metropolitan area is R51.74 with a standard deviation of 7.48. Assume a normal distribution.
games are built around random number generators. given any circumstance there is always a defined set of possible
Athlete will be disqualified during the next grading period?
consider an m state markov chain with transition matrix pij. note as usual the sum of the entries in any row add to
The sample proportion of grandparents as primary caregivers(p-hat) is to be calculated. What is the standard deviation of the sampling distribution of p-hat?
a sample of 235 students found that 18 had a gpa greater than 2.89. the population from which the sample was drawn is
what condition is necessary in order to use z-test to test the difference between two
FIND PROBALITY OF PULLING ETHIER AN EVEN NUMBER CARD OR A RED NUMBER CARD ON ONE PULL OF A CARD FROM A 52 CARD DECK?
Let X1,..., Xn be a random sample recorded as heads or tails resulting from tossing a coin n times with unknown probability p of heads. Find the MLE pˆ of p.
When using dummy variables in a regression equation to model a qualitative or categorical variable, the number of dummy variables should equal to
A professor in the psychology department would like to determine whether there has been a significant change in grading practices over the years.
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