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Suppose you wish to test a one-tail hypothesis where you reject H0 only in the lower tail. You calculate ZSTAT = 1.38. What is the statistical decision if you test the null hypothesis at the 0.01 level of significance?
Describe a research problem that would benefit from Factor Analysis. What are the variables and what would you hope to achieve?
Is this statistically significant evidence that candidate has sufficient valid signatures overall? Describe.
Suppose that weights of bags of potato chips coming from a factory follow a normal distribution with mean 12.8 ounces and standard deviation .6 ounces.
Components shipped include 0.5% defectives. You plan to select 80 items; if 0 are defective, you will assume all are okay.
Perform a chi-square test on the following data:
For patients over age 80, probability is 0.05 that coronary bypass patient will die soon after surgery, if hospital performs eight such operations, determine the probability of two or more fatalities?
Fit a multiple linear regression model for predicting the hospital duration using age, sex, body temperature, white blood cell counts, antibiotic use, blood culture and service
What is wrong with this design? What confounds could be leading to the results of improved memory and problem-solving skills?
Construct a 99% confidence interval (Konfidenz interval) for the difference in proportions of all adults and all teenagers who watched the program and liked it.
A Pew research study recently randomly selected two groups of people, men and women and asked them if they agree with the following statement:
Make use of Excel to determine the right-tail p-value.
Determine the following probabilities: Events A and B are mutually exclusive events defined on common sample space.
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