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Assume you were preparing two-way tables of percentages for following pairs of variables. How would you run the percentages?
a) Age and consumption of breakfast cereal
b) Marital Status and sports participation
c) Crime rate and unemployment rate
Statistics and Probability, Statistics
1. In stepwise regression, why might a predictor variable that correlates highly with the criterion variable not enter into the regression equation? 2. Explain how you would use regression analysis to see whether variabl ...
Under what conditions is a grouped frequency distribution more useful as a means of describing a set of scores than a simple frequency distribution? Why do researchers often add relative frequencies to their tables?
Consider the following game. A fair die is rolled. If the outcome is 4, then the game ends and you win 0. If the outcome is not 4, then you have the option of either stopping the game and receiving an amount equal to tha ...
Jullian was curious if regular excise really helps weight loss,she decided to perform a hypothesis test. A random sample of 5 Kansas State students was chosen. The students took a 30-minute exercise every day for 6 month ...
1. In what ways are experimental research designs preferable to correlational or descriptive designs? What are the limitations of experimental designs? 2. What is the purpose of random assignment to conditions? 3. Descri ...
Tell which measures are resistant to outliers and which are NOT resistant to outliers from the following list, and explain WHY or WHY NOT for each measure: Mean, median, Quartiles, correlation, and standard deviation.
A hospital emergency room analyzed n=17,665 hourly observations on its average occupancy rates using six binary predictor variables representing days of the week and two binary predictors representing the 8 hour work shi ...
A company manufactuirng compter chip finds that 8% of all chips manufactured are defective. Management is concerned that high employee turnover is partially responsible for the high defect rate. In an effort to decrease ...
An employer interviews 9 people for 6 computer programming positions in a company, and 4 of the 9 people are men. If all 9 are qualified, in how many ways can the employer fill the computer programming positions if exact ...
Imagine that you want to know whether the SAT is biased against Group X and in favor of Group Y. You administer the SAT to members of the two groups; then, 4 years later, you examine the correlations between SAT scores a ...
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