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1. Using SPSS, check the following data for homogeneity of variance:
Group 1 Group 2 Group 31 1 12 4 83 9 184 16 32
a. Using an alpha of .05, what can you conclude about homogeneity of variance from the output? Word process your responses on the SPSS output pages.
40 were in favor of the Independent candidate, and 140 were undecided. At a 1% level of significance, test to see if the proportion of voters has changed. Calculate the value of the Chi-Square Test Statistic for this problem. What is it?
The weight of the oranges, in pounds (1 pound = 16 ounces) is a random variable with standard deviation
Increasing the confidence-interval level from .95 to .99
Assuming that the dogs did better than what would be expected with random guessing, did they do well enough to be used for actual medical diagnoses? Why or why not?
What is the probability that they all hit the target?
Suppose a certain brand of Westinghouse light bulbs has a population life expectancy of 3000 and a population standard deviation equal to 100. (Assume the distribution of the population is normal). What is the probability that a sample of 30 light..
Psychologists once measured 77 variables on a sample of schizophrenic people and a sample of people who were not schizophrenic. They compared the two samples using 77 separate significance tests.
Would it be reasonable to conclude that the population distribution is Poisson with a mean of 2.0?
Use Hypothesis testing to determine if Dr. Boom is correct, that his sample of 25 rockets weight less than the average rocket.
Carry out the ANOVA and, if essential, post-hoc comparisons. Make a graph to represent group differences, and interpret ANOVA in a paragraph written in APA style.
Using this information, calculate Beta risk (probability of Type II error) if the true population mean really is 77.
What is the expected number of crimes that will be solved? What is the standard deviation?
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