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Find examples in the research that utilize the independent and dependent t-tests that are used to answer a question. Find the t value and its associated p value. Determine and evaluate the effect size and comment on the impact of proposed difference. Ask yourself and comment on your level of satisfaction with the "practical" significance of the findings.
It is better to use the median rather than the mean for a distribution when:
When 500 college students are randomly selected and surveyed, it is found that 135 of them own personal computers (based on data from the America Passage Media Corporation).
Find the probability that for a randomly selected office hour, the number of student arrivals is 3. (b) What is the probability that he will get at most 5 students in a randomly selected office hour?
Write down the differential equations which describe the probabilistic behavior of the unit in time as a Markov process.
What is the expected value of M and the standard error of M for a sample of n=4 scores? What is the expected value of M and the standard error of M for a sample of n = 25 scores?
What is the correlation between x3 and x2 and what is the pdf of x?
In a sample of 200 women, 144 of them said they were in debt. Test the claim that women are in deeper debt than men, at a=0.01.
Assuming that the standard deviation and the normal shape are unchanged, to what level must the mean reduce so that 20 gallons per week is the third quartile rather than the mean?
If the researchers test 95- newborns for the presence of this gene, would it be unlikely for them to find fewer than 25 children with the gene?
The data show that 48 of the doctors picked Brand X. If these data are evaluated using a chi-square test for goodness of fit, what is the expected frequency for Brand X?
A test is normally distributed with a mean of 40 and a standard deviation of 7. (a) What score would be needed to be in the 85th percentile?
Assume that demand for the upcoming weekend is normally distributed with a standard deviation of 30. What is the probability all the hotel's rooms will be rented?
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