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Suppose a wildlife service wishes to estimate, with 99% confidence, the mean number of days of hunting per hunter for all licensed hunters in the state during a given season, with a bound on the error of estimation equal to 2 hunting days. How many hunters must be included in the survey? Assume that the data collect in earlier surveys have show o = 10.
Find out the required probabilities utilizing Binomial distribution. According to Best buy, 2/3 citizens have iPods. In a randomly selected group of 3 iPod owners.
Can we compute the mean length of stay of workers at the company differs from the mean length of stay at that dangerous industry.
A research report summarizes the results of the hypothesis test by stating,"z = 2.13, p
A teacher divides her class into two groups. One group is taught a lesson on the computer and the other is taught by traditional lecture. The teacher then gives a test to see that group has better grades.
We can think of this as the value of mew that maximizes f(y), the probability that our observed value of y occurs.
Draw the suitable 2x2 table, compute and interpret suitable measure of association.
Make a graph to visualize the problem and state, without doing the calculations, whether the p-value of the test
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
Can we conclude there is a difference in mean number of surgeries performed by hospital or by day of week?
Recognize the kind of sampling (random, systematic, convenience, stratified, cluster) employed whenever a sample of people who smoke is obtained as explained below.
Explain clearly, in your own words, what is a Type I error in this context.
A civil service exam is given to 200 job applicants. In recent years, grades have followed a normal distribution with mean 66.5 and variance 100. The grades of the job applicants are distributed as follows:
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