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Good Sampling Method? To obtain students' opinions about proposed changes to course registration procedures, the administration of a small college asked for faculty volunteers who were willing to administer a survey in one of their classes. Twenty-three faculty members volunteered. Each faculty member gave the survey to all the students in one course of their choosing. Would this sampling method be considered a cluster sample? Why or why not?
Is the normal distribution (or its special case, the standard normal distribution) effective in characterizing situations and/or in helping managers make decisions?
1. a committee consisting of 3 people is drawn randomly from a room which contains 25 males and 15 females. let x be
At.05 level of significance, is there evidence to propose that mean life length of the batteries manufactured by this manufacturer is more than 400 hours?
questionthe table below provides summary information about students in a class. the sex of each individual and the
Suppose that in a certain population of married couples 30% of the husbands smoke, 20% of the wives smoke, and in 8% of the couples both the husband and wife smoke. Is the smoking status (smoker or nonsmoker) of the husband independent of that of the..
What is the calculated t value? Are the mean test scores of these two groups significantly different at the .05 level?
The null hypothesis is to be tested at 95% confidence. Determine the critical value for this test. What do you conclude? Determine the p-value and perform the test.
Technically, "statistic" refers to which?A sample characteristic A measure of variability
What is the engineer's concern about the overhead rate going "up and up"? What did the engineer mean about the large overhead rate being a disadvantage when placing bids and seeking new business?
Critically illustrate out the properties of a normal distribution. Explain why there are an infinite number of normal distributions.
consider a product organized into inspection lots of n1800 items and for which u175 gm. for this product u2u78 gm u2l72
1. the vehicle dispatching decisions of an airport-based taxi service were investigated. in modeling the system the
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