If a researcher randomly assigns subjects in a taste-testing study to Group 1 (Coke) or to Group 2 (Pepsi), what test is appropriate to assess differences insubjects' taste preferences?Select one:a. z test for one sampleb. t test for related samplesc. t test for one sampled. t test for independent samplesIn which of the following cases would a related samples t test be appropriate?Select one:a. Twenty middle-school children's sharing behaviors are measured once after they spend 1 month reading stories about sharing and again after 1 month ofwriting stories about sharing.b. Ten men and ten women recall the brands of objects in a briefly presented scene.Forty teenagers are randomly assigned to one of two measurement design conditions - an electronic survey versus a verbal interview.d. Young adults and older adults identity the qualities that make others look attractive.What sources of variance equal the total variance in a 1-way, within subjects (repoated measures) ANOVA?Select one:a. within groups, between subjects, error (chance)b. between groups, between subjects, error (chance)C. between groups, within groups, between subjectsd. between groups, error (chance)

Solution according to the guidelines we solve first question only

Answered: If a researcher randomly assigns…

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 selecting a sample, if you were to obtain a systematic sample of 40 from a population of 600, and your randomly selected starting point is 12, your next three selections should be: a. 24, 36, 48 b. 27, 42, 57 c. 42,92, 137 d. 90, 140, 190
A certain company will purchase the house of any employee who is transferred out of state and will handle all details of reselling the house. The purchase price is based on two assessments, one assessor being chosen by the employee and one by the company. Based on the sample of eight assessments shown, do the two assessors agree? Use the .01 level of significance. Assessments of Eight Homes ($ thousands) Assessed by Home 1 Home 2 Home 3 Home 4 Home 5 Home 6 Home 7 Home 8 Company 330 345 452 270 298 286 537 744 Employee 317 350 473 280 307 283 523 769 Click here for the Excel Data File (a) Choose the appropriate hypotheses. Assume d = company assessed value – employee assessed value. multiple choice 1 H0: μd = 0 versus H1: μd ≠ 0. H0: μd ≠ 0 versus H1: μd = 0. (b) State the decision rule for .01 level of significance. (Round your answers to 2 decimal places. A negative value should be indicated by a minus sign.) Reject the null hypothesis if tcalc < or…
.Pick the Test (Z-test, Single Sample T-test, Independent Sample T-test, Paired Sample Ttest, ANOVA): Suppose that two brands of gasoline were being compared for mileage. Samples of each brand were used in identical cars under identical conditions. Nine tests were made of Brand I and six tests of Brand II. Are the two brands significantly different? Test:
1. Data Set lists data from 100 M&Ms, and 27% of them are blue. The Mars candy company claims that the percentage of blue M&Ms is equal to 24%. Use a 0.05 significance level to test that claim.
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5. A high school teacher wants to see if there is an effect on vocabulary recall between when students take a quiz before lunch and when they take it after lunch. She randomly selected 10 students and assessed them before lunch on Tuesday. On Wednesday she randomly selected 10 students and assessed them after lunch. The following were the percentage results Before lunch 62 60 68 64 72 75 63 60 64 80 After lunch 72 85 72 62 84 76 66 63 65 64 What type of samples were selected – independent or dependent (paired)? Explain. StatCrunch was used to analyze the data, and the output for both types of samples (independent and dependent) is given below. Using the appropriate output, determine if the mean quiz score is higher for those who take the quiz before lunch over those who take the quiz after lunch at a significance level of 0.05. Hypothesis test results: mean before lunch mean after lunch Hypothesis test results: : µi - µ2 : mean of the PAIRED difference µ2 : between Before and After…
Q2) Paired-Samples t Test A research project has been tracking the health and cognitive functions of the elderly population in Arizona. The table below shows the memory test scores from some elderly residents, tested first when they were 65 years old and again when they were 75 years old. The researcher wants to know if there is a significant decline in memory functions from age 65 to age 75 based on this sample. In other words, it is hypothesized that the memory score at age 75 is significantly lower than the memory score at age 65. So the null and alternative hypotheses should be directional. The alpha level was set at a = .05 for a one-tailed hypothesis test. Memory score Subject 1 2 3 4 5 6 7 8 9 10 Age 65 62 95 55 90 98 73 73 71 82 66 Age 75 65 88 56 89 90 75 70 70 80 62
1.) What kind of research design should we use here (between-groups or within-groups? 2.) Which statistical test should we choose in this example? 3.) Ho: ? Ha: ?
Which of these experiments sounds the most like it would be analyzed with an Independent-Samples t-test? A. A study that gives patients a placebo on Monday and measures their pain, then has them back on Friday and gives them a real pain pill and measures their pain B. A study that compares tennis players vs. football players on their peak heart rate while playing their sports C.A study that looks at the attention span of a group of n=30 5-year-olds and then follows up with those same kids when they are 10-years-old D. A study that measures the knowledge of the transfer process for a group of Chaffey students, both before and after they attend an orientation
A study tested the effects of 4 different dosages of a new antidepressant on reducing depressive symptoms in one group of depressed participants. The order of the four dosages was counterbalanced across participants. Which statistical test should be used? Select one: a. One-way between subjects ANOVA b. One-way repeated measures ANOVA c. Two-way between subjects ANOVA Incorrect d. None of these options
1. A psychologist would like to examine the effects of sugar consumption on the activity level ofpreschool children. On the day of the study, a sample of 10 children does not receive any sugar.Another sample of 10 children is given sugary foods to consume. The psychologist records the activitylevel for each child. A. Single-sample z-testB. Single-sample t-testC. Independent samples t-testD. Related samples t-test (repeated measures or matched samples)E. Correlation

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