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Statistics question on "validity" and "reliability. What is the link between "validity" and "reliability?" How does sample size affect this link? Answer should include discussion of sampling, reliable measures, and valid measures.
Answer should be approx. - 250 words
slot machines are a very popular video game at casinos across the us. in a random sample of 400 men 260 rated slot
At Ajax Spring Water, a half-liter bottle of soft drink is supposed to contain a mean of 520 ml. The filling process follows a normal distribution with a known process standard deviation of 4 ml.
A share tipping service claims that its selections give an average return of 10% if held for 12 months. An investor wants to investigate this claim and records the returns of the last 20 shares that have met the 12 month period.
Suppose that when a transistor of a certain type is subjected to an accelerated life test, the lifetime X (in weeks) has a gamma distribution with mean 24 weeks and standard deviation 12 weeks.
a study found that foot lengths for japanese women are normally distributed with a mean of 24.9 and a standard
an agricultural researcher plants 100 plots with a new variety of yellow corn. assume that the yield per acre for the
Random sample of workers at each of three plants. Research question: Are the mean hourly productivity levels the same for workers in these three plants?
(Network Formulation of Nonbipartite Matching) Consider the nonbipartite matching problem of Example 10.4. Replace each node i with a pair of nodes i and i . For every arc (i, j) of the original problem, introduce an arc (i, j ) with value aij and..
A total of 28 percent of males living in Nevada smoke cigarettes, 6 percent smoke cigars, and 3 percent smoke both cigars and cigarettes. What percentage of males smoke neither cigars nor cigarettes?
an airplane with room for 100 passengers has a total baggage limit of 6000 lb. suppose that the total weight of the
Check the assumptions and conditions for inference on proportions. Find a 95% confidence interval for the true proportion of companies that provide health insurance benefits to all their employees.
a mcdougalls quarter pounder is supposed to have a mean weights of 4 ounces. mcdougalls will fined if its hamburgers on
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