Q2) Paired-Samples t TestA research project has been tracking the health and cognitive functions of the elderly population inArizona. The table below shows the memory test scores from some elderly residents, tested firstwhen they were 65 years old and again when they were 75 years old. The researcher wants toknow if there is a significant decline in memory functions from age 65 to age 75 based on thissample. In other words, it is hypothesized that the memory score at age 75 is significantly lowerthan 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 scoreSubject12345678910Age 6562955590987373718266Age 7565885689907570708062 a. Identify the dependent variable (this is the outcome measure) and the independent variable(this is what differentiates the two groups of data points being compared).b. Explain why a paired-samples t test is appropriate for answering this research question.c. What would be the null and alternative hypotheses in both words and symbol notations?d. Calculate the difference score by subtracting each "Age 65" score from the associated "Age 75"score for each subject. Fill in the column in the table below for "difference score."Hint: The difference score is calculated as (age 75 minus age 65), so a negative number indicates adecline in memory performance, which is the researcher's hypothesis.Subject12345678910Difference score(Age 75 minus Age 65)e. Calculate the mean and standard error from the sample of difference scores.f. Calculate the t statistic for the sample of difference scores.g. Determine the critical t value(s) based on the type of test, the preset alpha level, and degrees offreedom.h. Using jamovi, what is the corresponding p value for the t statistic?i. Compare the t statistic with the critical t value. Is the calculated t statistic more extreme or lessextreme than the critical t value? Compare as well the p value with the alpha. Based on thesecomparisons, do we "reject" or "fail to reject" the null hypothesis?k. Interpret the result in 1 sentence to answer the research question.1. Supporting Screenshot

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Answered: a. Identify the dependent variable…

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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Which one of these is NOT something that would be included in the Methods section of a research report? a. data regarding the reliability and validity of any measures used b. information regarding preregistration of the study c. details of the statistical analyses d. justification for sample size used in the study
The ------ estimates how large a role the independent variable has on the dependent variable, regardless of sample size.
What is one indication that there are paired samples in a data set? Choose the correct answer below. O A. Knowing the value that a subject has in one group gives one no information about the value in the second group. OB. Each observation in one group is coupled with one particular observation in the other group. OC. The researcher is comparing two populations. O D. The researcher is working with two distinct groups in the data set.
A researcher wanted to test whether there is a relationship between preferred sweet (Oreo cookies, Mars bars, or Twinkies) and age group (children, adolescents, or young adults). To test that, subjects from the three age groups were asked which of the three sweets they preferred. Which statistical test should be used to analyze the data? 1. chi square test of independece 2. chi square test for goodness of fit 3. one sample t test 4. one way anova test
In the General Social Survey, respondents were asked "If your party nominated a woman for President, would you vote for her if she were qualified for the job?" A two-way table summarizing the results for 953 respondents, by gender, is shown below: Gender Female Male Total Vote for female candidate? Yes No 488 66 335 64 823 130 The chi-square test statistic = 3.35. At a significance level of 0.05, what is your conclusion? O The null hypothesis is not rejected: there is no association between gender and support for a female president Total 554 399 953 O The null hypothesis is rejected: there is an association between gender and support for a female president. O The null hypothesis is not rejected: there is an association between gender and support for a female president. ty O The null hypothesis is rejected: there is no association between gender and support for a female president. Q Search or enter address +
If Ashley wants to test for GPA differences among first-, second-, third-, and fourth-year college students, which of these difference tests should she use? A. chi-square test of independence B. between-subjects, two-way ANOVA C. between-subjects, one-way ANOVA D. repeated-measures ANOVA
A study of the career plans of young women and men sent questionnaires to 722 students of class at one University. One question asked which major within the business program the student had chosen. With data we test a statement: Does the data suggest that there is a relationship between the gender of students and their choice of major? We calculated the p-value and it is 0,0127 and the level of significance is 0,05. The conclusion to the test is: a. there is sufficient evidence to conclude that the choice of major and the gender of the student are not independent of each other. b. there is insufficient evidence to conclude that more females prefer administration than males c. there is insufficient evidence to conclude that the choice of major and the gender of the student are not independent of each other. d. there is sufficient evidence to conclude that students find economics very hard. Zrušit mou volbu
What statistical analysis could be used to determine whether the unsuccessful dieters attained a significantly different percentage from their weight-loss goal, on average, than did the successful dieters? single-sample t test In which of the following four categories does this situation fall? a. only scale variables b. nominal independent variables, scale dependent variable c. only nominal variables d. any ordinal variables (that cannot be treated as nominal)
The results of a random sample of students by type of school and their attitudes on safety steps taken by the school staff are shown in the table below. At the 5% significance level, can you conclude that attitudes about safety steps taken by the school staff are related to the type of school? School staff has School Type Taken all steps for student safety Taken some steps for student safety Public 40 51 Private 64 34
A researcher is looking into the price of round trip airline tickets between LA and NY. The five number summary for the data sets provided below: 1. 240 2.$3753.$ 450 4. $657 5. $890 Complete the following: 1. Interpret the value of the third quartile in a contextualized sentence: Blank (answer options: 25%, 50%, at least 50, at least 25, at least 75, 75%) of _(answer iptions: airline tickets, round trip airline tockets between LA and NY, the price of an airline ticket between Ny and La) are priced_(375 or less, 657, 450, 375, 657, 450) 2. Determine if a ticker priced at 1200 would be an outlier. A ticker priced at 1200 ( answer options: would, eould not) be considered an iutlier because 1200 is (within, not within)_(the interval 93 and 939, the interval -48 and 1080, within 3 sd's of the mean, two standard deviations of the mean)
what is the nully hypothesis and alternative hypothesis
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

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