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Census data for a certain county show that 19% of the adult residents are Hispanic.
Suppose 72 people are called for jury duty and only 9 of them are Hispanic. Does this apparent underrepresentation of Hispanics call into question the fairness of the jury selection system? Explain.
every year sixth-grade students in ohio schools take proficiency tests. the list of sixth-grade reading score changes
Her results (in hours until turning a particular shade of brown) are in the table below. At ∞= .01, did she see a difference between the two treatments?
Peggy wants to know if her pack of cookies was statistically different from those of the rest of the class. She found out the average number of chips per cookie this year was 13.82 and the standard deviation for the class was 7.25. She had a pack ..
Scores on an exam appear to follow a normal distribution with μ = 60 and σ = 20. - For what range of scores should a D be given? - What percentage of the students will get a D?
the average tenure of technicians at abc company is 10 years with a standard deviation of 5 years. calculate the
Suppose there was 2,500 cards in the inventory and how would the results be useful to the owner to estimate the total value of the inventory. What equation is best?
a random sample of 121 checking accounts at a bank showed an average daily balance of 280. the population standard
In a survey about satisfaction with local phone service, those respondents who rated their current service as excellent and those who rated it Poor-Very Poor were asked to classify their current local service provider. The results are given in the..
What is the overall response rate for the 8000 names?
a coefficient of determination of 0.9 shows that 10 of variation in the dependent variable is caused by change in the
computing the z scores for the given data.for a normal distribution find the z-score value that separate the middle 90
Assume that correlation coefficient between 2 variables is nearly zero. What does this say about relationship between them?
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