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Prediction interval for the regression line.
Using the age and sick days data from table below, find the 98% prediction interval when x = 47 years.
Age= X
Sick days Y
18
16
26
12
39
9
48
5
53
6
58
2
Regression equation Credits=15.4-.07. Select the correct statement. Increase in number of hours worked per week increases the expected number of credits.
What is 95% confidence interval estimate for average number of years served by all Supreme Court justices?
Based on your answers to a through d, decide whether or not to reject the null hypothesis at the given significance level. Explain your conclusion in the context of the problem.
Do any of the selected samples seem to be out of the control limits? Describe.
An educational study uses a simple pre-post design to assess the efficacy of a computer tutor for solving inequalities. Twelve pilot students participate. Each student is given a pre-test, then participates in six sessions using the tutor, then i..
What is the likelihood all four of the selected flights arrived within 15 minutes of the scheduled time?
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
Evaluate the standard deviation - use the conservative value for the degrees of freedom, Assume the two groups are independent and the data are approximately Normal. Let µ 1 and µ 2 represent the mean heart rates we would observe for the entire po..
Give the Z- score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected
For this same sample of n = 45, find out the width of confidence interval around population mean? Illustrate all work.
Perform Repeated Measures ANOVA also calculate PRE. An educational study uses a simple pre-post design to assess the value of a computer tutor for solving inequalities.
Give null and alternative hypotheses for this test in symbolic form.
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