A study was carried out to investigate exam performance for university students. One version of the study involved students at the University of Taranaki, who volunteered to be in the study. Two groups were compared: a group that were trained in a new study technique and a group that were asked to use their current study technique. These groups were determined by giving participants the option to choose which group they were in. The researchers conducted a two sample t-test and found a difference of 6.5 between the mean exam scores for each group (p-value = 0.062), with the group that were trained in a new study technique having the higher mean. What kind of study was this (experiment or observational)

A study investigates whether there is a significant difference in mean exam scores between students who receive tutoring and those who do not. Which type of t-test would be most suitable?*One-sample t-testDependent samples t-testIndependent samples t-testPaired samples t-testNone of the above

Which kind of study can be used to gather information about how the study habits of your classmates  affect their final exam grades?observational studysurveysingle-blind experimentdouble-blind experimentsimple random sample

Which kind of study can be used to gather information about how the study habits of your classmates  affect their final exam grades?

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.

How to Study in Exam Time