INTRODUCTION TO STATISTICS CORRELATION AND REGRESSION ANALYSIS PRACTICE TEST 2026

INTRODUCTION TO STATISTICS
CORRELATION AND REGRESSION
ANALYSIS PRACTICE TEST 2026

◉ independent variable
Answer: is the variable manipulated by the researcher


◉ dependent variable
Answer: is the one observed to assess the effect of treatment


◉ margin of error
Answer: the sampling of error


◉ a researcher is interested in the texting habits of high school
students in the united state. if the researcher measures the number
of text messages that each individual sends each day and calculates
the average number for the enitre group of high school students, the
average number would be an example of a ____
Answer: parameter


◉ a group of 30 13-year-old is selected to participate in a research
study. The group of 3o 13-year-old girls is an example of _____

, Answer: sample


◉ in the same study, the amount of food eaten in one day is
measured for each girl and the researcher computes the average
score for the 30 13-year-old girls. The average score is an example of
____
Answer: statisitic


◉ Correlational Method Limitations
Answer: Can demonstrate the existence of a relationship
Does not provide an explanation for the relationship
Most importantly, does not demonstrate a cause-and-effect
relationship between the two variables


◉ Scores are obtained by observing and measuring ____that
scientists use to help define and explain external behaviors
Answer: variables


◉ The process of measurement consists of applying carefully
defined ______ for each variable
Answer: measurement procedures


◉ discrete variable