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A poll of 1125 adults in a certain country found that 55% identified themselves as the followers of some religion. The margin of error was 5 percentage points with 99% confidence.
Suppose the lot consists of ten boards, of which two are green. Does the assumption of independence now yield approximately the cor- rect answer for P(A n B)? What is the critical difference between the situation here and that of part (a)?
The probability of success for any trial of a binomial experiment is 25%. Find the probability that the proportion of successes in a sample of 500 is less that 22%. Repeat with a sample of 800. Repeat with a sample of 1,000.
1. the labor relations manager of a large corporation wished to study the absenteeism among workers at the companys
go a web site for two major professional polling organizations. study results from two recent polls. try to find one
An automobile rental agency has the following mileages (in thousands) for a simple random sample of 20 cars rented last year. Given this information, and assuming the data are from a population that is approximately normally distributed, constr..
1. What kinds of statistical data play a role in an auto insurance firm's decision on the annual premium you'll pay for your policy? 2. For each of the following, indicate the scale of mea- surement that best describes the information.
A group of exercise scientists claims the length of a workout for range-of-motion exercises is the same as for the other two types. Based on the confidence intervals in part (a), is there any evidence to refute this claim?
refer to the following table for questions 1 2 and 3. show all work. just the answer without supporting work will
Use the t test to determine whether the slope of the regression model is significant at α = 0.05.
web crawlers need to estimate the frequency of changes to web sites to maintain a current index for web searches.
Suppose that a Santa Clara County kindergartner is selected at random. Are the events selected student is a recent immigrant and selected student has TB independent or dependent events? Justify your answer using the given information.
Our decisions depend on how the options are presented to us. Here's an experiment that illustrates this phenomenon. Tell 20 subjects that they have been given $50 but can't keep it all.
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