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Problem: Marginal distributions. Give (in percents) the two marginal distributions, for marital status and for job grade.
Required:
1. Do each of your two sets of percents add to exactly 100%? If not, why not?
Does the data prove a significant difference in mean times?
Find the expected value if the cost of entering this sweepstakes is the cost of a postage stamp. Is it worth entering the contest?
Between what two values does the P -value of this test fall?
Explain what an outlier is
If the speed of lights is 3.00x 10 to the power of 8 m/sec, how long does it take light to travel 2.29x 10 to the power of 11 m, the distance from the sun to Mars? Round to one decimal place.
What would happen if the forest service agent took another sample of 31 trees? Would the slope change? Would the intercept change? What about a third sample of 31 trees?
A doctor believes that the variance of systolic blood pressure is 470. A random sample of 20 patients found a variance of 525. What is the smaller critical value that would be used in a hypothesis test at a .05 significance level?
If is the proportion of the next 100 shoppers that buy a packet of the crackers after tasting a free sample, then the probability that fewer than 30% buy a packet after tasting a free sample is approximately.
to compare the effect of stress in the form of noise on the ability to perform a simple task 70 subjects were divided
Question: If the regression line is drawn as Y = C + 1075x, when X was 2 and y was 239, given that the intercept was 11. Calculate the residual
an observational study investigates the connection between aspirin use and three vascular conditions - gastrointestinal
the following summary table presents the results from a repeated-measures anova comparing three treatment conditions.
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