Exam 3 Pg 3 & 5 Flashcards
A professor at a university ranks subjects based on students’ preferences identified through a survey. He ranks science first, mathematics second, and management third. What type of measurement scale has the professor employed?
Ordinal
the difference between an interval and a RATIO SCALE is that a ratio scale _____, while an INTERVAL SCALE DOES NOT.
has an absolute zero
When a line graph is employed to represent the number of subjects who received each possible score on a variable, the graph is called a _____.
frequency polygon
When graphically depicting frequency distributions, a _____ uses bars to display a frequency distribution for a quantitative variable.
histogram
The _____ of a set of scores is obtained by adding all the scores and dividing by the number of scores.
mean
The _____ is a measure of variability that is simply the difference between the highest score and the lowest score.
range
which of the following statements is true of the correlation coefficient?
It is a statistic that describes how strongly variables are related to one another.
The Pearson product-moment correlation coefficient (r) does not detect:
curvilinear relationships
_____ refers to the strength of association between variables
Effect size
The general form of a regression equation is _____.
Y = a + bX
Multiple correlation is a technique for:
Increasing the accuracy of a prediction
A correlation coefficient can be used when both variables use:
interval or ratio scale properties.
Tevy reports that individuals who follow her diet plan lose more weight than individuals who follow Jake’s diet plan. In actuality, there is no difference in weight loss between those following Tevy’s diet plan and those following Jake’s diet plan. In this case, Tevy’s claim illustrates a _____ error.
Type I
The probability of making a Type II error increases when the:
The effect size is small
When examining the strength of the relationship between study time and test score, the null hypothesis would suggest that the true population correlation is:
equal to 0.00.
Ethan concludes that there is no difference in the driving ability of drivers who have consumed one can of beer and those who have consumed three cans of beer. However, there actually is a difference in the driving ability of the drivers. In this case, Ethan has made a(n) _____ error.
Type II
