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An auto manufacturer advertises that "90% of the cars we've ever made are still on the road." Assuming this is literally true, how can it be explained? What facts / statistics would you need to know to expose this misleading claim?
Using the z table in Table E of Appendix C, determine the critical value for the hightailed test with a = 0.035.
At.05 level of significance test to find out if number of breakdowns is independent of shift.
Given are five observations collected in a regretion study on two variables: What is the value of the standard error of the estimate?
The Globe Fishery packs shrimp that weigh more than 1.91 ounces each in packages marked" large" and shrimp that weigh less than 0.47 ounces each into packages marked "small"; the remainder are packed in "medium" size packages.
What is the probability that in a sample of 10 pieces: 5 or more will be defective?
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
A local bank wants to install motion detector burglar alarms. Each has a 70% chance of detecting a burglar. If the bank wants to be 99% certain of detecting a burglar how many need to be installed?
Assume gasoline prices for a region are normally distributed. do the data you obtain provide enough evidence to reject the claim? use 1% level of significance.
What hypothesis testing procedure would you use in the following situations? Explain your reasons, including assumptions and limitations for selecting the procedure.
An upper-level sociology class at a large urban university has 120 students, including 34 seniors, 57 juniors, 22 sophomores and 7 freshmen.
Fit a linear regression model for bp against sodium. Do you think this is a model with a good fit? Why?
State the decision rule using the .01 significance level. Compute the value of chi-square. What is your decision regarding H0?
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