Two critical values for a two-tailed test
What are the two critical values for a two-tailed test with a 0.01 level of significance when n is large and the population standard deviation is known?
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You, of course, distrust him (you feel that it is much lower) and find that a random sample of 14 similar cars has a mean of price of $19,850 with a standard deviation of $1084. Is there enough evidence to reject the salesman's claim at "alpha" =
Test the null hypothesis that the population mean for Medicaid enrolled women is 25% with a population standard deviation of 8%
In a poll of 600 randomly selected subjects, 240 answered "yes" when asked if they planned to vote in a state election. Construct a 95% confidence interval estimate of the proportion of all who plan to vote in that election.
What is the probability of randomly sampling a set of 5 people out of this population who have a man IQ of 120 or greater?
At "alpha" = 0.05, is there enough evidence to conclude that, on average, these lakes are nonacidic?
Using the approximations for normal curves, what percentage of scores fall between the mean and one standard deviation below the mean?
Construct a 90% confidence interval estimate of the percentage of all adults who have the belief. Write a statement interpreting the confidence interval.
Suppose that the mean score on a creativity test is 20 and the standard deviation is 5. You are told that the distribution is normal. Using the approximations for normal curves, how many people would get a score between 15 and 25?
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