Two types of flares are tested for their burning times (in minutes) and sample results are given below. Brand X n = 35 x=19.4 Brand Y n=40 x=15.1 x=1.4 S=0.8 Construct a 95% confidence interval for the differences mx-my based on the sample data. A 3.5

Two types of flares are tested for their burning times (in minutes) and sample results are given below. Brand X n = 35 x=19.4 Brand Y n=40 x=15.1 x=1.4 S=0.8 Construct a 95% confidence interval for the differences mx-my based on the sample data. A 3.5

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The mean BMI in patients free of diabetes has been reported as 27.8. An investigator measured BMI in 12 patients who are free of diabetes and found a mean BMI of 30.2 with a standard deviation of 5.5. The investigator hypothesizes that the BMI in patients free of diabetes is higher than what has been reported. Is there evidence that the BMI is significantly higher that 27.8? Use a 5% level of significance. Give each of the following to receive full credit: 1) the appropriate null and alternative hypotheses; 2) the appropriate test; 3) the decision rule; 4) the calculation of the test statistic; and 5) your conclusion including a comparison to alpha or the critical value. You MUSTshow your work to receive full credit. Partial credit is available.
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Suppose you will perform a test to determine whether there is sufficient evidence
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Present the results using APA format. What does the conclusions mean in general terms?
QUESTION 4 Sara wants to determine the mean play time of media clips on her smartphone. A random sample of 36 media clips revealed a mean of 155 minutes and a standard deviation of 16 minutes. Find the upper confidence limit (UCL) of the 93% confidence interval estimate for the mean play time of media clips on Sara's smartphone. Round your answer to two decimal places.