Which type of experimental design can be analysed using a Mann-Whitney U test?Question 3Answera.A study in which doctors' happiness was measured on a scale along with the number of hours that they worked in a week.b.A study in which the frequency of participants was recorded for choosing a final year option in cognitive psychology, social psychology, or neuroscience for young versus mature students.c.An independent-sample design in which the number of correct responses on a statistics exam were recorded for two groups of participants: one group received their teaching online and the other group on campus.d.A repeated-measures design in which reaction times on a task were recorded before and after having caffeine.

What is the primary purpose of the Mann-Whitney U Test?  A. To compare means of two independent groups  B. To examine the relationship between two continuous variables  C. To test the difference between two sample proportions  D. To compare distributions of two independent groups

The Mann-Whitney U test is used to compare differences between two independent groups when the variable of interest is on the _______ scale.Answ

In an experiment to determine the best method by which to assess college students, a group of students were exposed to one of three types of tests. The three methods were: all multiple choice questions, all free-response questions, and a mix of question types (both multiple choice and free-response questions). The scores were recorded for each test taken. Fifteen students were used in the study, and grouped by class level (freshman, sophomore, junior, senior, and graduate). The following tables provide the results of the experiment.Class Level Multiple Choice Free-Response MixedFreshman 78 84 90Sophomore 82 90 95Junior 90 94 98Senior 88 96 100Graduate 95 98 99Below is the ANOVA table.ANOVA Source of Variation SS df MS F P-value F critClass Level 337.0667 4 84.2667 22.0786 0.000222 3.8379Testing Method 242.8 2 121.4 31.8079 0.000156 4.4590Error 30.5333 8 3.8167 Total 610.4 14  What would you tell the researchers about their results?Group of answer choicesAt the 0.01 level of significance, there is a significant difference among testing methods, and blocking, based on Class Level was useful in the analysis.At the 0.01 level of significance, there is a significant difference among testing methods, but blocking, based on Class Level was NOT useful in the analysis.These results reveal no significant differences.Graduate Students score significantly better than Freshman, regardless of the testing method.

POBLEM SOLVING : 1.The researchers were interested in the differences in heart rate between men and women while waiting for an interview. Use a Mann-Whitney U test to test if heart rate differs between men and women at the 95% level. The following data is provided: What is the U value based on the given information?

____ make observations of the same people over time.Multiple choice question.Double-blind studiesMeta-analysis designsLongitudinal designsCorrelational designs