d. What was the hypothesis?e. Were data collected?f. Were any statistical tests rung. What was the conclusion? 2. An Egg Production Company recently found that eating eggs does not increase aperson's blood serum cholesterol. Five hundred subjects participated in a study thatlasted for 2 years. The participants were randomly assigned to either no-egg groupor a moderate-egg group. The blood serum cholesterol levels were checked at thebeginning and end of the study. Overall, the groups' levels were significantlydifferent. The company reminds that eating egg is healthy if done in moderation.Many of the previous studies relating eggs and high blood serum cholesteroljumped to improper conclusion.Using this information. answer the following uestions:

1) Many of the earlier research linked to eggs and high blood serum cholesterol jumped to false…

Answered: 2. An Egg Production Company recently…

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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An experimenter investigated the effects of blue light exposure on people’s sleep quality. Researchers get 50 people and randomly assign 25 people to be exposed to blue light for 20 min. before bed and the other 25 people to have no blue light exposure 25 min. before bed. Each participant is sent to bed at 10pm and woken up at 7am the next morning. When all participants are woken up, they must fill out a sleep quality questionnaire. The scores seen below represent participants’ sleep quality ratings where higher numbers indicate better sleep quality. Does the blue light exposure negatively impact sleep quality? Blue light No Blue light 11 13 14 16 10 14 11 17 8 13 15 14 12 15 13 18 9 12 11 12 1. Analyze the data by hand or with SPSS/PSPP/JASP using the most…
A researcher conducts an independent-measures study examining how the brain chemical serotonin is related to aggression. One sample of rats serves as a control group and receives a placebo that does not affect normal levels of serotonin. A second sample of rats receives a drug that lowers brain levels of serotonin. Then the researcher tests the animals by recording the number of aggressive responses each of the rats display. The data are as follows. Control Low Serotonin n = 15 n = 20 M = 18 M = 22 SS = 172.5 SS = 135.0 a. What research design was used to answer this question? b. What was the scale of measurement for the dependent variable? c. What was the scale of measurement for the independent variable? d. Does the drug have a significant effect on aggression? Use an alpha level of .05, two tails. e. Compute r2 and write an…
Some commercial airplanes recirculate approximately 50% of the cabin air in order to increase fuel efficiency. The researchers studied 1102 airline passengers, among which some traveled on airplanes that recirculated air and others traveled on planes that did not recirculate air. Of the 519 passengers who flew on planes that did not recirculate air, 104 reported post-flight respiratory symptoms, while 113 of the 583 passengers on planes that did recirculate air reported such symptoms. Is there sufficient evidence to conclude that the proportion of passengers with post-flight respiratory symptoms differs for planes that do and do not recirculate air? Test the appropriate hypotheses using ? = 0.05. You may assume that it is reasonable to regard these two samples as being independently selected and as representative of the two populations of interest. (Use a statistical computer package to calculate the P-value. Use pdo not recirculate − pdo recirculate. Round your test statistic to two…
A researcher is studying two types of medication that both treat hives. 15 out of the random sample of 219 adults given medication A still had hives 30 minutes after taking the medication. 26 out of another random sample of 295 adults given medication B still had hives 30 minutes after taking the medication. Test to see if the proportion of people who still had hives after medicine A is different than the proportion of people who still had hives after medicine B. Use a 0.01 level of significance. The correct hypotheses are: O Ho:PA Рв(claim) Ο Η: pA Σ ΡΒ На: РА < Рв(claim) O Ho:PA = PB HA:PA + PB(Cclaim) Since the level of significance is 0.01 the critical value is 2.576 and -2.576 The test statistic is: (round to 3 places) The p-value is: (round to 3 places) The decision can be made to: O reject Ho O do not reject Ho The final conclusion is that: O There is enough evidence to reject the claim that the proportion of people who still had hives after medicine A is different than the…
You read a study about how opioid addiction can only be treated by addiction centers. It was paid for by some addiction recovery centers. It was done by looking at 14 of their patients. Do you think this a valid study?Explain your answer.
Help please!!
A social psychologist wants to know if people judge a person's attractiveness differently if they appear rich or poor. Two pictures were taken with the same model, one in expensive clothes standing next to a new sports car, and the other in old clothes standing next to an old hatchback car. In an online survey, participants were randomly divided so that they saw one of the two pictures and were asked to rate the model's attractiveness on a scale of 1 to 10. Which statistical test would be best to determine if there is a significant difference between groups? one-sample t-test dependent samples t-test independent samples t-test ANOVA
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Antibiotic is claimed to be effective in 70% of the patients it is given to. If antibiotic is given to 10 patients, how many patients would be expected to get better?
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A recent study examined the drinking behaviors of undergraduate college students (male and female freshmen). Each participant was asked how many alcoholic beverages they consumed during the past 7 days. The researchers wish to determine if there is a difference in the drinking habits of males and females in this age group. A recent study examined the drinking behaviors of undergraduate college students (male and female freshmen). Each participant was asked how many alcoholic beverages they consumed during the past 7 days. The researchers wish to determine if there is a difference in the drinking habits of male and females in this age group. Female Male 9 13 5 9 5 7 9 11 8 10 3 5 5 6 2 10 1 16 7 12 Which type of test will you run? What is the independent variable? What is the dependent variable?

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