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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.
Research question: Are the mean crash damages the same for these three vehicles?
You play a game with two possible outcomes. Outcome A has probability 0.4 and outcome B has probability 0.6. When B occurs you win $2.00; otherwise, you lose $1.00. What is your expected value for this game?
Find a 90% confidence interval for the population mean salary of such personnel. What is the margin of error.
Estimating a linear regression equation to predict the future values of the dependent variable Y.
Findout the margin of error for this survey if we want a 99 percent confidence in our estimate of the percent of adults over 50 who take vitamin supplements.
The sampling distribution of mean score is approximately Normal. It has mean. What is its standard deviation?
The means appear to be very close, but not the variances. At α = .05, is there a difference in variances? Show all steps clearly, including an illustration of the decision rule.
A simple random sample of 6 recent graduates revealed the following information about their weekly incomes. What is the expected value of the average weekly income of all the recent graduates?
Make up a scatter diagram with 10 dots for each of the following situations:
What sample size would be needed to estimate the true proportion of students at your college
A GSS asked. "What do you think is the ideal number of children for a family to have? the 497 female who responded had a median of 2, mean of 3.02 and standard deviation of 1.81 (a) Report the point estimate of the population mean.
Research question : At α = . 01, is degree of certainty independent of credits earned?
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