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"Determine if the statement is a typical null hypothesis (Ho) or alternative hypothesis (Ha). The average price of a particular statistics textbook over the Internet is the same as the average price of the textbook sold at all bookstores in a college town".
If possible, determine a 95% confidence interval for average number of television sets in all 50,000 households. If this is not possible, describe why not.
Using the .05 significance level, can we conclude that there is a positive association between the two variables?
Given following financing project being considered by venture film, determine critical path probability of completion by 17 weeks.
Record the type of research design used. True lab experiment, quasi-experiment, field experiment, or correlation design.
How strong is the evidence against the company's claim? Based on these data, the P -value of the appropriate test
Using a 0.01 level of significance, test the claim that the tutoring has an effect on the math scores.
A 'good' correlation is data-context driven. For example, I did a project correlating sales volume per state and customer demographics (pretty 'hard' data) and got a .92 correlation.
Describe the purpose of transforming raw scores into standard scores. Describe what "normal distribution" means.
Test to see if the mean cell phone bill has changed since 2004. Use a .05 level of significance for the test.
What is the probability that the mean completion time is between 1 and 2 hours, i.e.., 60 and 120 minutes?
Duracell Ltd claim that the life of their batteries in motorised soft toys is approximately normally distributed with a mean of 102.9 hours and a standard deviation of 16.5 hours.
Insurance policy from company A costs $300 a year but guarantees to replace any losses due to theft. Create the decision tree.
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