The following data were obtained from a dependent t-test research study. What is the value of Mp for these data? Subject Before After 15 10 4 4 11 4.5 3.5 4 3.
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- The following data were obtained from a dependent t-test research study. What is the value of MD for these data?Two samples, each with n = 9 scores, produce an independent-measures t statistic of t = 2.00. If the effect size is measured using r2, what is the value of r2?A researcher conducted a t-test for independent samples to evaluate the mean difference between two treatment conditions and obtained t(48) = 4.00. What would be the computed F, if the outcomes of this study were evaluated by one-actor ANOVA for independent samples?
- For a special pre–New Year’s Eve show, a radio station personality has invited a small panel of prominent local citizens to help demonstrate to listeners the adverse effect of alcohol on reaction time. The reaction times (in seconds) before and after consuming four drinks are in data below. At the 0.005 level, has the program host made his point? Identify and interpret the p-value for the test. Data: Subject Before After 1 0.32 0.39 2 0.39 0.44 3 0.36 0.49 4 0.41 0.53 5 0.37 0.46 6 0.42 0.52 7 0.41 0.52 8 0.43 0.46 9 0.39 0.55 10 0.41 0.52 11 0.35 0.45 12 0.42 0.41 13 0.32 0.54 14 0.39 0.46 15 0.41 0.53 16 0.33 0.54 17 0.43 0.46 18 0.42 0.43 19 0.41 0.52 20 0.35 0.52 21 0.39 0.41 22 0.39 0.44 23 0.32 0.50 24 0.33 0.53 25 0.31 0.45 26 0.35 0.45 27 0.31 0.45 28 0.32 0.48 29 0.38 0.54 30 0.37 0.46 31 0.39 0.49 32 0.30 0.51 33 0.40 0.49 34 0.41 0.50 35 0.41 0.53 36 0.35 0.47 37 0.37 0.51 38 0.41 0.46A researcher conducts an independent-measure study comparing two treatments and reports the t statistic as t(25) = 2.071 How many individuals participated in the entire study? Using a two-tailed test with a= 0.5, is there a significant difference between the two treatments?A researcher conducts an independent-measures study comparing two treatments and reports the t statistic as t(30) = 2.085. How many individuals participated in the entire study? Using a two-tailed test with α = .05, is there a significant difference between the two treatments?
- Interpret the following statement regarding the statistical findings of a research study. “61% (n = 36) of recipients of the low-carbohydrate diet and 23% (n = 14) of recipients of the low-fat diet completed the study and lost greater than 10% of their initial body weight (P < 0.001).” Number of participants who completed the study and lost greater than 10% of their body weight: P-value: Does this p-value indicate a statistically-significant difference in the average weight loss between the two groups:A two-sided t-test for a population mean is conducted with H0: = 80. If a 99 percent t-interval constructedfrom the same sample data contains the value of 80, which of the following can be concluded about thehypothesis test at significance level of = 0.01?The following SPSS output examines the percent of security staff that is female at private and public prisons. Based on the output answer the question below. Assuming the difference was significant, what is the effect size based on a calculated r2? A small difference between the prisons A moderate difference between the prisons A large difference between the prisons
- The following data are from a random sample of 10 students who participated in a study undertaken to investigate the effect of sleep time (measured in average number of hours of sleep per night) on GPA (grade point average, measured on a 4-point scale). Student Sleep time GPA 1 7 3.28 2 9 3.16 3 8 3.75 4 6 2.50 5 4 2.45 6 8 2.91 7 7 3.53 8 6 3.02 9 3 2.30 10 8 3.48 a. Find the equation between GPA (y) as function of sleep time (x). b. What is the estimated GPA of a student who averages 5 hours of sleep per night? c. What is the coefficient of determination? *(no use EXCEL)Below is bivariate data on vintage dresser auctions, where X is the year of construction of the dresser and Y is the price sold at auction. Answer the following questions below using evidence.A researcher is interested in hamster wheel-running activity during the summer versus the winter. He suspects that either the hamsters will run less during the winter to conserve energy or they will run more to keep warm. He records the activity of n = 16 hamsters during June, July, and August and compares their running-wheel revolutions per hour to the activity of the same hamsters during December, January, and February. The data are collected, and the results show an average difference score of MDD = 3.8 and a sum of squares of SS = 522.15. What is the value for degrees of freedom for this repeated-measures t test? 47 15 50 16 What is the sample standard deviation (s) for the D scores? 1.48 5.9 522.15 34.81 What is the estimated standard error of the mean difference (sMDMD) for this study? 0.37 2.18 1.48 1.22