BeforeAfterexposure5.1exposure5.2| Participant #1Participant #2Participant #3Participant #44.34.02.52.54.94.0Calculate an approximate 99% confidence interval for the difference in mean mood rating (after-before).Assume that all conditions for testing of hypothesis have been met.(a) Provide detailed calculations; use technology to calculate required sample statistics and percentiles.(b) Verify your results using technology (provide the output). A researcher wants to know if mood is affected by music. She conducts a test on a sample of 4 randomlyselected adults and measures mood rating before and after being exposed to classic rock music. The followingare the mood ratings for the four participants:

The data measures mood rating before and after being exposed to classic rock music.

Answered: Calculate an approximate 99% confidence…

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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Estimate a 98% confidence interval for the population mean using the below sample data, n= 25, x bar= 71.3 and S = 3.2 Round answer to two decimals
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Determine the t-percentile that is required to construct each of the following one-sided confidence intervals:(a) Confidence level = 95%, degrees of freedom = 14(b) Confidence level = 99%, degrees of freedom = 19(c) Confidence level = 99.9%, degrees of freedom = 24
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Suppose you are interested in studying regional differences in crime rates. You take a random sample of 100 cities in the South, and find a mean crime rate of 55 with a sample variance of 5.78. A sample of 100 cities in the North has a mean crime rate of 50 with a sample variance of 6.72. Construct a 95% confidence interval around the difference in crime rates between the population of Southern cities and the population of Northern cities. Interpret, in words, the meaning of this interval.
Allen's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.t Suppose a small group of 14 Allen's hummingbirds has been under study in Arizona. The average weight for these birds is x = 3.15 grams. Based on previous studies, we can assume that the weights of Allen's hummingbirds have a normal distribution, with o = 0.22 gram. (a) Find an 80% confidence interval for the average weights of Allen's hummingbirds in the study region. What is the margin of error? (Round your answers to two decimal places.) lower limit upper limit margin of error
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