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1. Distinguish between the null hypothesis and the research hypothesis. When does the researcher decide to reject the null hypothesis?
2. What factors are most important in determining whether obtained results will be significant?
an average american family spends 927 dollars on christmas gifts with standard deviation of 200.what is the probability
if the sample standard deviation is 10.5 and the sample mean is 48 based on a study with a sample size of 120 the 95
Find the moment generating function of their sum and identify the corresponding distribution, its mean and its variance.
To test whether the significant difference between two proportion test using large sample test.
between quarterly audits a company checks its accounting procedures to detect problems before they become serious. the
1. Show that if S is the real line R with usual metric, then Theorem 11.7.2 holds for the probability space (0, 1) with Lebesgue measure. Hint: Let Xn be the inverse of the distribution function of Pn as defined in Proposi- tion 9.1.2.
An insurance company insures four large risks. The number of losses for each risk is independent and identically distributed on the points {0, 1, 2} with probabilities 0.7, 0.2, and 0.1, respectively. The size of an individual loss has the followi..
A carpet company advertises that it will deliver your carpet within 15 days of purchase. A sample of 49 past customers is taken. The average delivery time in the sample was 16.2 days.
Forty-eight male bank supervisors were each given the same personal file and asked to judge whether the person should be promoted to a branch manager job that was described as "routine", or the file held and other applicants interviewed.
a tennis player has a 68 percent succes rate on first serves and migt serve 85 times in a match. assuming that each
The experiment data in below table was to evaluate the effects of three variables on invoice errors for a company. Invoice errors had been a major contributor to lengthening the time that customers took to pay their invoices and increasing the acc..
The national average SAT score (for Verbal and Math) is 1028. Suppose that nothing is known about the shape of the distribution and that the standard deviation is 100. If a random sample of 200 scores were selected and the sample mean were calcula..
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