A researcher is interested in comparing three methods of weight loss: vegan diet, low-fat diet, and low-carb diet. He selects 30 overweight subjects and randomly assigns 10 to each weight-loss program. The weight reductions (in pounds) were measured after a 1- month period. Fill in all missing values in the table. With a=.05, determine whether there are any significant differences among the conditions. If necessary, use the Tukey HSD posttest to determine which groups are significantly different. Vegan diet Low-fat diet Low-carb diet Weight Reduction 5.5 7.5 8.5 Source SS DF MS Between Treatments 36 F = Within Treatments 81 Total X

An instructor for a test preparation course claims that the course will improve the test scores of students. The table shows the critical reading scores for 14 students the first two times they took the test. Before taking the test for the second time, the students took the instructor's course to try to improve their critical reading test scores. At a = 0.01, is there enough evidence to support the instructor's claim? Complete parts (a) through (f). Student 1 2 3 4 7 8 10 11 12 13 14 Score on first test 366 449 434375 426 507501 337 347544 428 558 401 410 Score on second test 375515 497 406 381 536 455454 406 596 474 583 441 447

A researcher evaluated the effectiveness of relaxation training in reducing anxiety. One sample of anxiety ridden people received relaxation training, while a second sample did not. Then anxiety scores were measured for all subjects, using a standardized test. Us the information summarized in the following table to complete this item.  The Effect of Relaxation Training on Anxiety Scores Group  Mean Anxiety Score  SE Control group  36  12 Relaxation   training 18  10 What is the DV (remember, the DV is the data)?  What is the level of measurement of the DV?  What is the best graph to display this data? Explain

Are the digits of your R-number a quantitative or qualitative variable?

What is the type of the variable "The barcode of items displayed in a supermarket"? a. Quantitative - Discrete O b. Qualitative - Nominal Oc. Quantitative - Continuous Od Qualitative - Ordinal

A researcher reports an F-ratio with df = 2, 18 from an independent measures research study. 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? Number of Treatments _____ Number of Subjects _____

Apparently what I put was incorrect.

A researcher reports an F-ratio with df = 3, 56 from an independent-measures research study.  How many treatment conditions were compared in the study? How many participants were in the study?

1. Was a dependent or independent t-test used to analyze the data? How do you know?

improvements to the experimental design?