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Why do we do power calculations with single sample z test?
A) Because we can use Z area tables to calculate the power.
B) Because comparing a sample mean against a population mean is very powerful
C) Three of the other answers
D) Two of the other answers
E) If the standard deviation had to be estimated from the sample, the calculations would involve t distributions, which vary by sample size.
The explanatory variable which is a measure of neighborhood socio-economic status variable RFM. Response variable is percent (%) of bicycle riders that wears a helmet.
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In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken.
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Recognize and explain potential threats (up to 3) to external validity.
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Suppose you found that in doing the hypothesis test, you were able to reject the null hypothesis. What is the most appropriate conclusion to draw?
Draw a tree diagram representing this experiment. Use this tree diagram to find the probabilities below.
Using t test for significance of slope to determine whether the independent variable is a significant predictor of the dependent variable - Find the sum of the least squares slope and intercept parameter?
By using the normal probability distribution, what is the probability the car will be repaired in 35 minutes or less?
What is the probability that a randomly selected automobile manufactured by the company will have a defective microprocessor?
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