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1. What is meant by the sensitivity of a dependent measure? What are ceiling and floor effects?
2. What are demand characteristics? Describe ways to minimize demand characteristics.
3. What is the reason for a placebo group?
a researcher claims that the variation in the number of days that factory workers misses due to illness is greater than
What percent of the sample means will be greater than 135 but less than 148 seconds? (Round your answer to 2 decimal places.)
it is estimated that 68 of the voters in the city are against a new sales tax. if 20 voters are selected at random
The sat scores attainted by the students in nyc are approximately normally distributed with a mean of 500 and a standard deviation of 80. Find the percentage of students who score less than 700.
suppose on the upcoming weekend there is a 50 chance of rain on saturday and a 40 chance on sunday. furthermore suppose
A departmental store that wishes to examine whether it is losing or gaining customers draws a sample from its list of credit cardholders by selecting every tenth name.
A plus four 95% confidence interval for the difference between the two population proportions of wrist injuries is: A. 0.2909 ± 0.1674. B. 0.2909 ± 0.1069. C. 0.2909 ± 0.0907. D. 0.2909 ± 0.1275
suppose we are testing the null hypothesis ho20 and the alternative ha does not 20 for a normal population with a
Nationwide, the average time until a electric utility customer service representative answers a call is 260 second. The Gigantic Kilowatt Energy Company randomly sampled 30 calls and found that, on average, they were answered in 227 second with a ..
construct your own empirical probability situation. that is determine a probability value in relation to your expected
Explain in managerial terms what is meant by "use an alpha level = .05." Do you agree with her suggestion? If so, explain why. If not, explain why and indicate the alpha level you would use instead.
in a certain town 10 of the families have no children 10 have one child 40 have two children 30 have three children and
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