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There are two other mathematically equivalent ways to do a hypothesis test: the p value method and the critical region method. Can you describe them? What is the null hypothesis? What is the decision rule? What are we comparing when we do the critical region method or the p value method?
If A and B are independent events with P(A) = 0.4 and P(B) = 0.6, then P(A∩B) is
Suppose 1.5 percent of the antennas on new Nokia cell phones are defective. For a random sample of 200 antennas, find the probability that:
Estimate the true mean tensile strength of bars of this size and tyoe using 90% confidence interval. List any assumptions you need to make. Given n=150, x(bar)=477N/mm^2, and s=13.
1.ginger root is used by many as a dietary supplement. a manufacturer of supplements produces capsules that are
Let X be the mean of a random sample of size n from a distribution that is N(µ, u2), where the positive variance u2 is known. Use the fact that (1)(2) - Cl>( -}) = 0.954 to find, for each µ,
By measuring the amount of time it takes a component of a product to move from one workstation to the next, an engineer has estimated that the standard deviation is 3.22 seconds.
Explain what you could do to reverse the trend of competitive exclusion by humans so that we do not exhaust the limited resources of the Earth
Refer to Table 7.27 in Chapter 7 with opinion about premarital sex as the response variable. Use a process (such as backward elimination) or criterion (such as AIC) to select a model. Interpret the parameter estimates for that model.
In a sample of 476 adults selected randomly from one town, it is found that 9 of them have been exposed to a particular strain of the flu. Find the Pvalue for a test of the claim that the proportion of all adults in the town that have been exposed..
In a group of six professors selected at random, what is the expected number of extroverts? What is the standard deviation of the distribution?
a manufacturer claims the average life of a product is 500 hours. the lifetime of the product is assumed to follow an
Identify the type of sampling (random, systematic, convenience, stratified, cluster) used when a sample of people who smoke is obtained as described below.
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