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The accompanying data on degree of spirituality for a sample of natural scientists and a sample of social scientists working at research universities appeared in the paper "Conflict Between Religion and Science among Academic Scientists" (Journal for the Scientific Study of Religion [2009]: 276-292). Assume that it is reasonable to regard these two samples as representative of natural and social scientists at research universities. Is there evidence that the spirituality category proportions are not the same for natural and social scientists? Test the relevant hypotheses using a significance level of .01.
a shell oil company executive says that a majority of workers more than 50 prefer a 10 hour four day work week over an
What do the data appear to show? Check the conditions for one-way ANOVA. Which requirements are a bit dubious in this setting?
Vision. It is generally believed that nearsightedness affects about 12% of all children. A school district tests the vision of 169 incoming kindergarten.
Gas Station pump signs, at one chain, encourage customers to have their oil checked, claiming that one out of every four cars should have its oil topped.
Construct a frequency distribution table of the scores having approximately 10 class intervals and construct a cumulative percentage curve. Use your curve to determine the percentage of scores that fall below a value of 55.
Of the 180 left-handed students, 93 reported at least one injury, and 619 of the 1716 right-handed students reported at least one injury in the same period. Calculate the 95% confidence interval for the proportion of stu- dents with at least one i..
A 1-hour flight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the other will fail? Show all steps carefully.
Estimate the percent that did not have any dental expense. What was the cost for the 10 percent of employees who incurred the highest dental expense?
a. Specify the competing hypotheses for the Jarque-Bera test of normality of MPG.
An outside financial auditor has observed that about 4% of all documents he examines contain an error of some sort. Assuming this proportion to be accurate.
Determine kas a function of µ such that ƒ is the probability density function of a random variable X. What is the distribution function of X?3- If we define Y=X-λ/µ. What is the distribution of Y?
the mean price of a pound of ground beef in 75 cities in the midwest is 2.11 and the standard deviation is 0.56. a
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