A researcher reports an F-statistic (F-ratio) with df = (3, 18) from an independent-measures ANOVA. Based on the df values, how many treatments were compared in the study and what was the total number of subjects participating in the study?
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Q: A researcher reports an F-statistic (F-ratio) with df = (3, 18) from an independent-measures ANOVA.…
A: Given, df = (3, 18) i.e., Treatment df=3 Error df=18 total df= 3+18=21
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A researcher reports an F-statistic (F-ratio) with df = (3, 18) from an independent-measures ANOVA. Based on the df values, how many treatments were compared in the study and what was the total number of subjects participating in the study?
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- A researcher reports an F-statistic (F-ratio) with df = (3, 18) from an independent-measures ANOVA. Based on the df values, how many treatments were compared in the study and what was the total number of subjects participating in the study? 4 treatments and 21 subjects 3 treatments and 22 subjects 3 treatments and 21 subjects 4 treatments and 22 subjectsA research study examined the effects of a new drug versus an old drug on hypertension. There were 172 people enrolled in the new drug group, and 125 of them were hypertensive. For the old drug group, 165 people were enrolled and of those, 76 were hypertensive. Was there a difference in the proportion of people who were hypertensive between the new drug and the old drug? Calculate the z or t test statisticA researcher conducts an experiment comparing four treatment conditions with n = 12 scores in each condition. If the researcher uses an independent-measures design, how many individuals are needed for the study and what are the df values for the F-ratio? If the researcher uses a repeated-measures design, how many individuals are needed for the study and what are the df values for the F-ratio
- A researcher conducts a repeated-measures experiment using a sample of n = 15 subjects to evaluate the differences among three treatment conditions. If the results are examined with an ANOVA, what are the df values for the F-ratio?For an indenpendent- measures ANOVA comparing three treatments with a sample of n=5 in each treatment, what is the critical value for the F-ratio using a=.05?A researcher conducts an experiment comparing four treatment conditions with n = 12 each scores in each conditions a. If the researcher uses an independent-measures design, how many individuals are needed for the study and what are the df values for the F-ratio b. If the researcher uses a repeated-measures design, how many individuals are needed for the study and what are the df values for the F-ratio?
- What happened to mean of the ratio between two variables which are normally distributed (with two different means) ?How many stomach cancer patients and controls would be required to estimate the difference in proportion of patients with sufficient concentrations of plasma antioxidant vitamins with a margin of error not exceeding 5% using a 95% CI? The data in table 8-2 were reported recently from a similar study investigating the sufficiency of plasma antioxidant vitmians in throat cancer patients.A recent study reported that the prevalence of hyperlipidemia ( defined as total cholesterol over 200) is 30% in children 2 to 6 years of age. If 12 are analyzed: How many would be expected to meet the criteria for hyperlipidemia?
- A researcher conducts a repeated-measures experiment using a sample of n=8 subjects to evaluate the differences among 4 treatment conditions. If the results are examined with an ANOVA, what are the df values for the F-ratioRosner analyzed data from children who lived near a lead smelter (which is a facility that uses extreme heat to extract the metal lead from lead ore) in El Paso, Texas, and reported that out of 124 children studied, 23 developed colic (which is a pattern of fussiness and crying for no apparent reason). Suppose that in the state of Taxes in general at the time (early 1980s), the rate of colic in children was 16.0%. Follow the steps for testing whether the proportion of children developing clico was significantly different for the 124 children living near the lead smelter than for Taxes children in general (16%). Use alpha level of 0.03 a. Identify the null hypothesis for this statistical test. b. Identify the alternative hypotheses for this statistical test. c. Explain: Why should this be a two-tailed test, the way I have described it? d. calculate the sample proportion p̂, rounded to three decimal places. e. Calculate the appropriate test statistic, show all work. f. Based on…Suppose an experiment finds that people taking a new herbal remedy get fewer colds than people taking a placebo. The results are statistically significant at the 0.01 level. Has the experiment proven that the herbal remedy works?