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Given the hypothesis Ho: u=400, you conduct a sample of 12 observations and obtain a sample mean of 407 and a sample standard deviation of 6. Using a .01 significance level to test to see if you would reject Ho, what would be the value of your critical value? i.e the positive one?
47% of students have children under 17 living at home with them. Find the probability that a random sample of 800 students will return more than 50% students with children under 17 living at home with them.
Use a 0.05 significance level to test the claim of a cereal lobbyist that the mean for all cereals is less than 0.3g.
Is there evidence that the population mean is above $300, if X (bar) = $305.11 and s = $43.20?
What is the mean of this uniform distribution? What is the standard deviation?
At 95% confidence, test to determine if more than 21% of the population will like the new soft drink.
The overall model statistically adequate at a 0.05 level of significance for predicting sale price(y)? For a moving average which is not true?
When the non-parametric statistics utilized? Write down an example.
What does it mean for two random variables to be uncorrelated?
A committe studying employer-employee relations proposed that a rating system be adopted. Each employee would rate his or her inmediate supervisor and in turn the supervisor would rate each employee.
Conduct a hypothesis test using the .04 level of significance to determine if there is a difference between the population means.
A study was conducted to determine if there was a relationship between the prices a non-member of a club paid for various publications and the prices that a member paid for the same publications. The data gathered is shown below.
The Gallup organization conducted a telephone survey with a random selected national sample of 1005 adults, 18 years and older. The survey asked the respondents, "How would you describe your own physical health at this time? "Response categories w..
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