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At the start of the study the mean of the group was 24 and the end of the study the mean of the group was 30. The standard deviation of the difference scores was 12.0 and we had 16 subjects. Was there a significant change in the patients condition over the course of the study?
b) Suppose we repeated the study and got exactly the same t statistic even though this time we used 101 subjects. was there a significant change over the coarse of the study?
Read the data from the fictitious research study regarding diabetes and alcohol consumption, and analyze and interpret the results.
Similar survey of student population 10 years ago found that coffee shop was favoured by 20% of students, and pizza and hamburger were each preferred by 40% of the students. Determine the expected frequencies for chi-square test.
After polling every 8 th graduate, a major university estimated annual salary of its alumni to be $103,000. What sampling technique was used?
To report their finding they want to create a 90% confidence interval. What would be the margin error for this confidence interval?
From the given probability distribution finite the mean and standard deviation.
To test the given claim using Single Proportion Z test.
Assuming that these results are sample data randomly selected from the population of all past and future Olympic games
Determination of Nominal, Ordinal, Interval, Ratio.Temperature is an example of what level of measurement.
Then describe trade-offs which will happen when you lower sample to $10,000 to meet their budget.
At the .05 significance level, can we conclude that the guideline is still reasonable?
Assume that the class has 60 students and that the examination period is 90 minutes in length. How many students do you expect will be unable to complete the exam in the allotted time.
A brand name has a 60% recognition rate. If the owner of the brand wants to verify that rate by beginning with a small sample of 10 randomly selected consumers, find the probability that exactly 6 of the 10 consumers recognize the brand name.
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