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The following data give the weights (in pounds) for a random sample of 20 NFL players.
285 178 311 276 192 232 259 189 298 211269 285 296 193 288 254 246 234 274 229
Test the hypothesis that the median weight of NFL players is 250 pounds against the alter- native that it is greater at α = 0.05, using (a) the large sample sign test and (b) the Wilcoxon signed rank test.
Create the estimated regression equation by calculating the values of b 0 and b 1
How many subjects must be tested to determine the effectiveness of the product?
a psychologist studied the effect of frequent testing on perception of course material. in one of the professors
Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation
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suppose a point xy is chosen at random from the disk x2 y2 lt 1. find a the marginal density of x and b the
question how does horsepower and weight affect the mileage of family sedans?nbsp data from a sample of twenty 2010
1. What is the rejection region for a two-tailed test when α = 0.05?
What are some critical decisions involved in selecting an appropriate measurment scale? How might these decisions influence the research design?
A school tracks the absences of pupils as part of a flu surveillance system. Regular reporting of absences among 25 students in grade 1 are taken, and based on these data, the long-run proportion of absences under normal conditions is estimated to..
How many participants need to be enrolled in each group to have 90% chance of detecting a significant difference using a two-sided test with a a= .05 if compliance is perfect?
to be able to conduct a t-test it is importantthat the independent- as well as the dependent variable is measured on a
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