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Assignment
1. Describe t-test and explain how to interpret its results?2. Explain when to use the z-test instead of t-test?3. Discuss the differences between parametric and non-parametric tests?4. Explain how the Wilcoxon Sign Test is conducted?
Two-sample T for side_sideAge_Group N Mean StDev SE Meanelderly 9 22.2 10.3 3.4young 8 15.13 3.91 1.4Difference = mu (elderly) - mu (young)Estimate for difference: 7.1095% CI for difference: (-1.13, 15.32)T-Test of difference = 0 (vs not =): T..
Find a point estimate of the true proportion of all light bulbs that last more than 500 hours. Find the critical value for ta/2 corresponding to n = 12.
Write the null and alternative hypotheses used to test the question above (e.g., whether participation in the course affects writing scores).
How do small companies compare to the major competitor and Has satisfaction with the manufacturer changed since the change in company ownership?
The process of analyzing sample data in order to draw conclusions about the characteristics of a population is called
Examine the effects of region of residence in northeast, south, mid-west, and west and income that is low, medium, and high
an investigator wants to assess whether smoking is a risk factor for pancreatic cancer. electronic medical records at a
The z-test is used when the sample size is greater than 30 and the standard deviation is known; the t-test is used when the sample size is less.
Festival Histogram: Beginning with in the text on spotting outliers, correct the type in the data as directed - create a separate histogram for each day, Day1, Day2, and Day3, using the hygiene variable for all three days. Include the normal curve
Prepare a relevant analysis to explain if DELL_AGAIN differ in terms of the performance ratings of Q8 when these variables are considered simultaneously.
The American Airlines flights would like to study the departure delay time. They would like to test the claim that the mean departure delay time for all flights from New York to Los Angeles is less than 12 min. They recorded 64 different departure de..
What is going on with my multivariate/SPSS statistics?
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