6. A researcher examines the short-term effects of a single treatment with acupuncture on cigarette smoking. Participants smoke approximately a pack of cigarettes a day are assigned to one of two groups. One group receives the treatment with acupuncture needles. The second group of participants serves as the control group and is given relaxation instructions while on the examining table but no acupuncture treatment. The number of cigarettes smoked the next day is recorded for all participants. ``{r} t.test(control, acupuncture, alternative = "two.sided", conf.level = 0.95, var.equal = TRUE, paired = FALSE) Two Sample t-test data: control and acupuncture t = 2.7627, df = 14, p-value = 0.01526 alternative hypothesis: true difference in means is not equal to 0 95 percent confidence interval: 2.096735 16.653265 sample estimates: mean of x mean of y 20.500 11.125 *** {r} sd control) sd(acupuncture) [1] 5.8554 [1] 7.605214 Answer the following items (a) - (k) based on the study description and the R output given above: (a) What is the independent variable? (b) What are the levels of the independent variable? (c) What is the level of measurement of the independent variable? (d) What is the dependent variable?

6. A researcher examines the short-term effects of a single treatment with acupuncture on cigarette smoking. Participants smoke approximately a pack of cigarettes a day are assigned to one of two groups. One group receives the treatment with acupuncture needles. The second group of participants serves as the control group and is given relaxation instructions while on the examining table but no acupuncture treatment. The number of cigarettes smoked the next day is recorded for all participants. ``{r} t.test(control, acupuncture, alternative = "two.sided", conf.level = 0.95, var.equal = TRUE, paired = FALSE) Two Sample t-test data: control and acupuncture t = 2.7627, df = 14, p-value = 0.01526 alternative hypothesis: true difference in means is not equal to 0 95 percent confidence interval: 2.096735 16.653265 sample estimates: mean of x mean of y 20.500 11.125 *** {r} sd control) sd(acupuncture) [1] 5.8554 [1] 7.605214 Answer the following items (a) - (k) based on the study description and the R output given above: (a) What is the independent variable? (b) What are the levels of the independent variable? (c) What is the level of measurement of the independent variable? (d) What is the dependent variable?

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Description: 6. A researcher examines the short-term effects of a single treatment with acupuncture oncigarette smoking. Participants smoke approximately a pack of cigarettes a day areassigned to one of two groups. One group receives the treatment with acupunctu

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 28PPS

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