A marketing director developed a short television commercial to improve the image of a company.  The commercial was tested on 20 people.  People’s attitudes about the company were measured with a questionnaire when they first came in for the experiment and then again with the same questionnaire after viewing the commercial.  Which statistical test would be best to determine if there is a significant difference between measures?     one-sample t-test     dependent samples t-test     independent samples t-test     ANOVA

Q: In the following scenarios identify the sample and variables for the study. A researcher wants to…

A: The population is the set of all objects which has the characteristics of the variable of interest…

Q: Past studies have indicated that the percentage of smokers is estimated to be about 33%. Given the…

A:

Q: Let µi =the true mean score for all students like these receiving the intervention and u2 = the true…

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Q: In an ANOVA setting, the choose your answer... sum of squares measures the variability of the sample…

A: We have given that following statement with a blank In an ANOVA setting, the______ sum of squares…

Q: You    want    to    test    whether    the    proportion    of    men    who    smoke    is…

A: Given that  Male  Female  Sample size (n1) = 200 Sample size (n2) = 200 Smoke (x1) = 62 Smoke…

Q: An occupational therapist (OT) is comparing two different treatments to see which is more effective…

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Q: What statistical test should he use to analyze the data? a. Independent Samples t-test b. Chi…

A: From the given data, we have to test whether female employees are more likely or less likely to be…

Q: ake a GRE practice test.   She then taught the students a relaxation exercise that they were to…

A: The dependent -samples t-test for a mean difference is used to compare the means of two related…

Q: Construct a 90% confidence interval for the true difference between the mean amounts of time spent…

A:

Q: A researcher wanted to investigate whether life satisfaction differed between high school students,…

A: It is given that the researcher wants to test whether the life satisfaction differed between high…

Q: What is the difference between sample means and a distribution of sample proportions?

A: Given : Sample mean : Average of sample observations is known as "sample mean". Sample proportion :…

Q: For the data presented below, use SPSS to conduct a Pearson r test to determine if a significant…

A: Introduction:Assume that the data are at least approximately normal.The null and alternate…

Q: A researcher is comparing the weekly alcohol consumption for adolescent males versus adolescent…

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A: Formula : Test statistic

Q: Maria owns and manages a small business, selling food via carts to people in the business district…

A: a) F statistic = Between-group variability​(MSB)/Within-group variability(MSW) = 9590.43/2572.67 =…

Q: Create two scenarios when you would use an independent samples t-test. Make sure to clearly…

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Q: Which of the following research situations is most likely to use a two sample independent-measures…

A:

Q: The goals scored per game by a soccer team represent the first quartile for all teams in a league.…

A: The goals scored per game by a soccer team represent the first quartile for all the teams in a…

Q: . Does this score differ from the perceptions of those couples in this sample of data

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Q: Explain the difference between an independent and dependent sample. Give an example of each.

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Q: Find the critical values of these situations: a. p-test, right tail, level of significance 7.5% b.…

A: a) Here, the level of significance is 0.075 and the test is right tailed.

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A: The variables are gender and satisfaction level.

Q: The mean cost of a meal for two in a mid-range restaurant in Tokyo is $40 (Numbeo.com website,…

A: Given the mean cost of a mean for two in mid- range restaurant in tokyo is $40.The data for cost of…

Q: The correct order of a statistical analysis is?

A: The question is about statistical analysis Introduction : Statistical analysis : The analysis which…

Q: Yessica thought that there was a correlation between the amount of time students slept the evening…

A: From the given information assume that x defines the sleep time the evening before the final exam…

Q: A poll surveyed people about taxing sugar-sweetened beverages. The results are presented in the…

A: State the hypotheses.

Q: Which of the following research situations is most likely to use an independent-samples design?

A: The independent samples design is used when there are two different groups which are unrelated.

Q: A software company is interested in improving customer satisfaction rate from the 80% currently…

A: Given that  Sample size n =243 Favorable cases x =205 Sample proportion p^=x/n  =205/243 =0.8436…

Q: You have been hired by a consortium of local car dealers to conduct a survey about the purchases of…

A: Given: Confidence level = 95% Margin of error = 0.03 Formula Used: n = ZαMargin of error2 p(1-p)

Q: A local bank wants to study waiting times of customers. A sample of four customers is selected on…

A: Given information, The local bank plans to study waiting times of customer. The sample of four…

Q: less concerned about their health and safety and are therefore less inclined to wear seat belts. Is…

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