The following data were obtained from a repeated-measures research study. What is the value of MD for these data? Subject             1st   2nd #1                      10     15 #2                        4       8 #3                        7       5 #4                        6      11

The following data were obtained from a repeated-measures study. What is the value of SS for the difference scores? Subject      1 st       2 nd #1                10           11 #2.               4             6 #3               7               9 #4               6               5 A. 10 B. 9 C. 6 D. 4 E. 1

Measuring Seals from PhotosListed below are the overhead widths (in cm) of seals measured from photographs and the weights of the seals (in kg). The data are based on “Mass Estimation of Weddell Seals Using Techniques of Photogrammetry,” by R. Garrott of Montana State University. The purpose of the study was to determine if weights of seals could be determined from overhead photographs. Is there sufficient evidence to conclude that there is a correlation between overhead widths of seals from photographs and the weights of the seals?

What is the mean for the difference scores for the following data from a repeated-measures study, which requires a dependent t-test for evaluation? T1 T2 Dscores 5 13   2 10   6 6   7 15

The following data were obtained from an independent measures research study comparing three treatment conditions. Use an ANOVA with  = .05 to determine whether there are any significant mean differences among the treatments.                                                     TREATMENT I                                               II                                              III 5                                              2                                              7 1                                              6                                              3 2                                              2                                              2 3                                             3                                               4 0                                             5                                               5 1                                             3                                               2 2…

Below are several research scenarios. Indicate which set of statistical analyses (e.g., ANOVA, independent samples t test, correlated samples t test, correlation, chi-square, regression) should be used to analyze the data collected in study, and explain why that statistical test should be used. (a) Teachers at a local middle school were interested in exploring the effects of a collaborative peer tutor teaching program on the motivation levels seventh-grade students. Four of eight classes of seventh grade students were randomly selected at Bulloch Middle School to serve as subjects in this study. Students within each class were then randomly assigned to one of three groups: a collaborative peer tutor teaching program, group learning activities, or individual learning activities. Each class was taught by a different teacher. The Middleman motivation scale was used to measure motivation in the subjects, and this scale produces scores that range from 1 to 25 with higher scores indicating…

If a research design has only one scale variables and the researcher is asking a question about the degree of association between those two variables, which research design is appropriate? a. Pearson correlation coefficient b. factorial ANOVA c. regression d. independent-samples t test

The accompanying data were read from a plot (and are a subset of the complete data set) given in an article. The data represent the mean response times for a group of individuals with closed-head injury (CHI) and a matched control group without head injury on 10 different tasks. Each observation was based on a different study, and used different subjects, so it is reasonable to assume that the observations are independent. Study 1 y= 2 3 4 5 6 7 8 9 10 Mean Response Time CHI Control 250 360 475 525 610 740 880 920 1010 1200 304 492 432 659 683 922 1044 1421 1329 1481 1815 (a) Fit a linear regression model that would allow you to predict the mean response time for those suffering a closed-head injury from the mean response time on the same task for individuals with no head injury. (Round your answers to four decimal places.) (b) Do the sample data support the hypothesis that there is a useful linear relationship between the mean response time for individuals with no head injury and the…

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Given the data below, what is the calculated test statistic?   Placebo Medication 1 Medication 2 3 4 9 1 3 7 3 5 8 2 5 11 4 4 9 3     SS1 = 5.33 SS2 = 2.8 SS3 = 8.8 T1 = 16 T2 = 21 T3 = 44 n1 = 6 n2 = 5 n3 = 5     ∑X2 = 53 Do you reject the null?      Yes     No   Was there a treatment effect for type of medication on number of anti-anxiety symptoms?     Yes     No