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An independent-measures t test produced a t statistic with df=20. If the same data had been evaluated with an analysis of variance, what would be the df values for the F-ratio?
1. 1,192. 1,203. 2,194. 2,20
If mean height when these plants are treated with the certain chemical varies from 185. Define the null hypothesis H0 and alternative hypothesis H1 which we would use for this test.
How do you verify that the assumption of a normal distribution is correct if you've only the mean and standard deviation?
You have administered a standardized test of manual dexterity to two groups of 10 semi skilled workers. One of these two groups of workers will be employed by you to work in a warehouse with many fragile items.
Find a 90% confidence interval for the population mean weight of all such turtles.
You will actually have negative sales using this multiple regression analysis
Individual loss amounts (ground up) this year follow an inverse Weibull distribution with τ= 3 and expected value 1000. Next year you con?fidently expect loss amounts to in?ate by 10% uniformly across the board.
An oil co. is drilling some wells. the results are described as either a dry well or a producer well. Past experience suggests that 10% of exploratory wells are producer wells.
A psychologist claims that more than 6.3% of the populations suffer from professional due to greate shyness. Categorize the Type II error in this context.
What is the OR of getting cancer fora late child birth woman compared to an early first birth woman?
What is the chi-square goodness-of-fit test? What are the differences/similarities between this test and an independent t-test? How do you know when to use one analysis over the other? Show an example.
Scrap rates per thousand (parts whose defects cannot be reworked) are compared for 5 randomly selected days at three plants. Does the data prove a significant difference in mean scrap rates?
Bolts are randomly selected until a 5 mm bolt is obtained. The outcomes are the sequences of bolts that can be selected. So one outcome is 1, and the other is 342. List the equally likely outcomes.
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