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A professor would like to utilize the normal distribution to assign grades such that 5% of students receive A's. If the exam average is 62 with a standard deviation of 13, what grade should be the cutoff for an A?
Four brands of lightbulbs are being considered for use in the final assembly area of the Saturn plant in Spring Hill, Tennessee. The director of purchasing asked for samples of 100 from each manufacturer.
For the binomial sample information summarized below, indicate whether the sample size is large enough to use the large sample approximation to construct a confidence interval for p.
The average for the test is a 1700 and the population's standard deviation is 50. what percentile rank of students is Logan in based on her SAT score.
Describe the assumptions of normality and homogeneity of variance. When these assumptions are violated, what are your options?
If samples of size 224 were repeatedly selected from the population of children born to mothers with HIV antibody, what would be the mean number of infected children per sample?
Specify the appropriate null and alternative hypotheses if we wish to test the research hypothesis that the mean GHQ score for all employed men exceeds 10.
Which of the following is a major difference between the binomial and the hypergeometric distributions?
Using a level of significance of .10, is there evidence that the dual degree students are receiving lower grades? Fully explain your answer.
Probability of .2, $15 with a probability of .35. How much should the lab budget for next year's rat orders assuming the distribution stays the same.
The U.S. Commission of Crime wishes to estimate the fraction of crimes related to firearms in an area with one of the highest crime rates in the country.
A quality control specialist compares the output from a machine with a new lubricant to the output of machines with the old lubricant.
Among 12 adults randomly selected from this area, only 3 reported that their health was excellent. Find the probability that when 12 adults are randomly selected, 3 or fewer are in excellent health.
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