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If you obtained a Pearson correlation (r) of 1.50, you would know that

The following linear regression equation was determined from 100 students who reported how long they studied for the final exam, where X is the number of hours that students studied for the final exam, and Y is the final exam score Y = 85 + 2 (X) In this equation, what does the 2 represent?

A researcher was interested in evaluating the effectiveness of 3 programs (Yoga, Physical Exercise, Mental Imagery) designed to reduce test anxiety in 1st year college students.  60 1st year students at 1 college volunteered for the study.  The researcher randomly assigned: 20 students to the Yoga condition, 20 to the Physical Exercise condition, and 20 to the Mental Imagery condition.   The researcher evaluated the effectiveness of the programs by comparing the Test Anxiety scores (Cronbach’s alpha = .05) of the students right before the students took their final exams. What is the dependent variable?

A researcher was interested in comparing the grade point averages of male and female freshmen undergraduate Biology students.   25 male and 25 female freshmen undergraduate Biology students were randomly selected from 1 large university.  Grade point averages were computed at the end of the year. Is this sample a non-probability sample or a probability sample? 

indicate whether the sample is a probability sample or a nonprobability and provide a brief description of the sampling method. stratified random sample

In hypothesis testing, what is a Type 1 error?

A study investigated the number of hours of sleep 7th grade students had before their math  exam  and 7th grade students’ performance on the math exam. What type of research design is used in this study?

In a frequency distribution of 100 scores, the mean is 80 and the median is 60.  One would expect that this distribution is:

A researcher was interested in comparing the grade point averages of male and female freshmen undergraduate Biology students.   25 male and 25 female freshmen undergraduate Biology students were randomly selected from 1 large university.  Grade point averages were computed at the end of the year. What is the independent variable(s)?

A researcher was interested in evaluating the effectiveness of 3 programs (Yoga, Physical Exercise, Mental Imagery) designed to reduce test anxiety in 1st year college students.  60 1st year students at 1 college volunteered for the study.  The researcher randomly assigned: 20 students to the Yoga condition, 20 to the Physical Exercise condition, and 20 to the Mental Imagery condition.   The researcher evaluated the effectiveness of the programs by comparing the Test Anxiety scores (Cronbach’s alpha = .05) of the students right before the students took their final exams. What is Cronbach’s alpha?