48. A doctor is concerned that a drug treatment causes people to run a fever. She recruited n = 50participants and gave them the drug treatment. She then measured their body temperature 2hours later. She wants to compare the average temperature of her sample to the populationaverage body temperature of 98.6°F to see if the participants temperature is significantly different.Which statistical tests should she use?a.Z-testb. One-sample testc. Independent sample t-testd. Dependent sample t-test49. A 7th grade science teacher would like to know if spending more time doing class experiments willhelp his students perform better on tests. In a day, he teaches 4 periods of science, so for his 1stand 3th period classes, he taught as he normally does with mostly lectures and occasional classexperiments. For his 2nd and 4th period classes, he did a class experiment every day with minimallectures. There was n = 25 different students in each of his classes. He then wanted to comparethe exam averages between his classes to see if student performance was significantly different.Which of statistical tests should he use?a. Z-testb. One-sample testc. Independent sample t-testd. Dependent sample t-test

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Answered: 48. A doctor is concerned that a drug…

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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Is the amount of sodium (in milligrams) in brand-name cereals the same as the amount of sodium in generic cereals? The sodium content in milligrams from a random sample of some brand-name cereals is given in the table below. Brand-Name: x=139.92 , s=61.24 , n=21 Generic: x=154.33 , s=73.87 , n=24 Is there a difference between the sodium content in generic and brand-name cereals? Use a significance level of 0.10. hypothesis test is needed
Please see below. I only have ONE ATTEMPT at this. In July 2004, Gallup Poll asked 1005 US adults if they actively try to avoid carbohydrates in their diet. That number increased to 27% from 20% in a similar 2002 poll. Has the proportion changed? Which test should you use? A t-test for means B z-test for proportions C 2-sample test for proportions D matched pairs E z-test for means F 2-sample test for means
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Please answer B, C & D.
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From candy to jewelry to flowers, the average consumer was expected to spend $104.63 for Mother’s Day in 2005, according to a Democrat & Chronicle article. Local merchants thought this average was too high for their area. They contracted an agency to conduct a study. A random sample of 60 consumers was taken at a local shopping mall the Saturday before Mother’s Day and produced the sample mean amount of $94.27. If σ = $29.50, does the sample provide sufficient evidence to support the merchants’ claim at the 0.03 level of significance? 1. Do you recognize any flaws in this study and what conclusions can you draw? The article “Well-fed Crickets Bowl Maidens Over” reports that female field crickets are attracted to males that have high chirp rates and hypothesized that chirp rate is related to nutritional status. The usual chirp rate doe male field crickets was reported to vary around a mean of 60 chirps per second. To investigate whether chirp rate was related to nutritional…
C, D, G
A college administrator wants to know if there is a significant difference between sexual orientation and level of family support for students at their college. The administrator takes a random sample of students who identify as gay/lesbian, bisexual or heterosexual/straight. There were 22 students sampled in each category. A measure of family support is given with higher scores indicating more family support. The means are as follows: Gay/lesbian Bisexual Heterosexual/Straight MG/L = 16 MBi = 17 MH/S = 22 Source SS df MS F Orientation 300 Error 2961 Total What is the value of df total?
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