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1. Select the best statistical analysis technique for the following. Be very precise about your statistical choice. Please specify exactly which statistical analysis technique would be used, e.g. One-Way ANOVA and the level of measurement for the variable.
You wish to test the null hypothesis that age (defined as young = 20 to 30 years old, and middle age = 31 to 50) makes no difference in purchasing one of four makes of cars (DV = Honda, Toyota, Lexus, Chevy). Which statistical test would you conduct and why? 2. In comparing the effectiveness of three methods of training (IV) in how to handle interviews with the press, you plan to administer a test (DV measured on an interval scale) to the participants in three different seminars with each seminar using a different training method.
State the research hypothesis being tested.
Which sampling method would yield the best representative sample? Write a paragraph with the rationale for the selecting the sampling design.
Name the inferential statistical test that would be used for the method of training and why?
Provide a discussion that supports the assumption that the variance of savings increases with family income.
How many samples would be needed to create a 99 percent confidence interval that is within 0.02 of true proportion of premium grade fuel-quality failures.
There are two telephone lines A and B. Let E1 be the event that line A is being used and E2 be the event that line B is being used
Here are fifty observations on the weight of tea bags. Create mean, mode and median.
Compute z values for each and comment on your findings.
Determine percentage of employees has 5 dependents? Of all employees which have at least one dependent, determine percentage has more than one?
Test hypothesis that people in State A are more depressed than U.S. population. Illustrate all of your hypothesis steps. (Use alpha = .01.)
The student with the 92 found a grading error on her exam and her correct grade was 95. There were no other grading errors. After correcting this student's paper, the five number summary for the midterm exam will be
Below are the sample times in minutes. At the .05 significance level, can we conclude that there is a difference in their mean times?
At 0.01 significance level can we conclude that mean fare has increased? Determine the p-value?
Is the hot-air balloon significantly shorter than light rail? How can you tell? What do you tell university officials?
Determine a 95% confidence interval for true time battery pack can function before having to be recharged.
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