Hypnosis. A sample of 100 people was separated into children and adults. The members of each group were randomly assigned to two different hypnosis exercises. The responses of each person were recorded at the completion of the experiment

Hypnosis. A sample of 100 people was separated into children and adults. The members of each group were randomly assigned to two different hypnosis exercises. The responses of each person were recorded at the completion of the experiment

Name: Hypnosis. A sample of 100 people was separated into children and adul
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Description: Hypnosis. A sample of 100 people was separated into children and adults. The members of each group were randomlyassigned to two different hypnosis exercises. The responses of each person were recorded at the completion of the experiment

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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In statistics, a population is a set of similar items or events which is of interest for some question or experiment and a sample is a set of data collected from a population by a defined procedure. In the following examples of statistical studies, identify the population of interest and the sample and provide the sample size. i. An employee at the local ice cream parlor asks six customers if they like mint ice cream. o Population: Select an answer o Sample size: ii. A sample of three thousand randomly selected adults were asked whether they drink at least 42 oz of water each day and only 31% said 'yes'. o Population: Select an answer o Sample size: iii. In a poll of four hundred randomly selected college students, 61% answered "yes" when asked "Do you have a television in your dorm room?" o Population: Select an answer o Sample size:
Crossover trial: A crossover trial is a type of experiment used to compare two drugs. Subjects take one drug for a period of time, then switch to the other. The responses of the subjects are then compared using matched-pair methods. In an experiment to compare two pain relievers, seven subjects took one pain reliever for two weeks, then switched to the other. They rated their pain level from 1 to 10, with larger numbers representing higher levels of pain. The results are listed below. Can you conclude that the mean pain level is less with drug B? Let μ₁ represent the mean pain level with drug and μμ₁ −μ₂. Use the a = 0.01 level and the critical value method with the table. Ⓡ Subject 1 2 3 4 5 6 7 Drug A 6 4 3 2 3 66 Drug B 4 2 1 2 3 3 6 Send data to Excel (a) State the appropriate null and alternate hypotheses. (b) Compute the test statistic. (c) State a conclusion. Part 1 of 5 (a) State the appropriate null and alternate hypotheses. H₁ H₂ = 0 H₁ H₂>0 This is a right-tailed ▼test.…
In an experiment conducted online at some university, study participants are asked to react to a stimulus. In one experiment, the participants must press a key on seeing a green screen and reaction time (in seconds) to press the key is measured. The same person is then asked to press a key on seeing a purple screen, again with reaction time measured. The results for six randomly selected study participants are as follows. Participant 1 2 3 4 5 6 Green 0.582 0.481 0.841 0.266 0.685 0.449 Purple 0.408 0.407 0.542 0.401 0.456 0.532 Why are these matched pairs data? In this study, the color that the participant was first asked to react to was randomly selected. Why is this a good idea in this experiment? Is the reaction time to the green stimulus different from the reaction time to the purple stimulus at the a = 0.01 level of significance? Make sure that you check the conditions for the test and explain how the conditions are met,…
Classify the experiments according to their experimental designs. Some designs may be used more than once.
Crossover trial: A crossover trial is a type of experiment used to compare two drugs. Subjects take one drug for a period of time, then switch to the other. The responses of the subjects are then compared using matched-pair methods. In an experiment to compare two pain relievers, seven subjects took one pain reliever for two weeks, then switched to the other. They rated their pain level from 1 to 10 , with larger numbers representing higher levels of pain. The results are listed below. Can you conclude that the mean pain level is less with drug B? Let μ1 represent the mean pain level with drug A and =μd−μ1μ2 . Use the =α0.01 level and the critical value method with the table. Subject 1 2 3 4 5 6 7 Drug A 5 7 3 1 2 7 7 Drug B 3 4 2 1 2 5 4 Send data to Excel (a) State the appropriate null and alternate hypotheses. (b) Compute the test statistic. (c) State…
A consumer researcher gave consumers a sample shampoo. After using the shampoo, each consumer used an interval-level scale to rate his or her satisfaction with it. Scores could range from 0 to 100, with higher scores indicating greater satisfaction. Consumers didn’t know each other and were randomly assigned to three groups: (1) receive a store brand of shampoo in a bottle clearly labeled as such, (2) receive a premium brand of shampoo in the premium brand’s bottle, or (3) receive a store brand of shampoo in the premium brand’s bottle. Here are the collected data:Store brand, store bottle70656560M = 65 s= 4.08SSbetween = 1400Premium brand, premium bottle85909590M = 90 s=4.08Store brand, premium bottle85809085M = 85 s=4.
. Is using meditation to relax and clear the mind a natural way to treat insomnia? Design an experiment to investigate this question. Assume that you have 20 individuals who suffer from insomnia available to participate in the study. At the end of two months, you will ask subjects to rate their sleep quality.
Decide if each of the following statements is True or False. If a sample of n = 10 scores is transformed into z-scores, there will be five positive z-scores and five negative z-scores. True False
Explain correctly.
After once again losing a hockey game to the Michigan Tech,the alumini association of NMU conducted a survey to see if alumini were in favour of firing the coach.A simple random sample of 100 alumini from the population of all living alumini was taken .Sixty-four of the alumini in the sample were in favour of firing the coach.Let p represent the proportion of all living alumini who favor firing the coach. what is a 99% confidence interval for p?
A vaccine to prevent a severe virus was given to children within the first year of life as part of a drug study. The study reported that of the 3456bchildren randomly assigned the vaccine, 58 got the virus. Of the 1606 children randomly assigned the placebo, 46 got the virus. a. Find the sample percentage of children who caught the virus in each group. Is the sample percentage lower for the vaccine group, as investigators hoped? b. Determine whether the vaccine is effective in reducing the chance of catching the virus, using a significance level of 0.01.The first few steps of the hypothesis-testing procedure are given. Complete the procedure.