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1. A die is rolled 720 independent times. Compute, approximately, the probability that the number of fives that appear will be between 1 10 and 125 inclusive.
2. A part is produced with a mean of 6.2 ounces and a standard deviation of 0.2 ounce. What is the probability that the weight of 100 such items is between 6 l6 and 624 ounces?
3. Let X., . . . , X 25 be a random sample of size 25 from a distribution having p.d.f. /(x) = x/6 , x = 1, 2, 3, zero elsewhere. Approximate Pr (.,f_ , X; = 50, 51, . . . , or 60).
Construct a 95% confidence interval for the difference M1-M2 between the mean spending on prescription allergy relief medication (M1).
In forestry there appears to be a correlation between the diameter of a tree at breast height and the totol height of the tree. For the following sample of ten white spruces first construct a scatter plot then find the correlation (r) between heig..
find z value describeda find z such that 82 of the standard normal curve lies to the right of z.b find the z value such
In an effort to estimate the mean amount spent per customer for dinner at a major Atlanta restaurant, data were collected for a sample of 49 customers. At 95% confidence, what is the margin of error (to 1 decimal)?
in 2008 a university in the midwestern united states surveyed its full-time first-year students after they completed
Multiple comparison procedures are going to be done using the Bonferroni method with = 0.05. The value of t** is 2.4667. Which of the following is the appropriate conclusion from carrying out these multiple comparisons?
Find the mean and standard deviation of X, the number of students in class, who will develop influenza.
what is the first big change that american drivers made due to higher gas prices? according to a survey 30 said that it
An estimated population variance of 200. a.) What is the standard deviation of the distribution of differences between means? b.) What is the mean? c.) What will be its shape?
A metropolitan school system consists of three school districts-norths, south, central. The north district contains 25% of all students, the south district contains 40%, and the central district contains 35%.
A researcher tested the reading ability of two groups of primary care patients. The scores on the test range from 1 to 9 with 9 indicating a high degree of reading ability and 1 very limited reading ability.
What is the 2001- 2012 compound growth rate? Using the result obtained in part a, what is your 2013 projections?
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