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Correlation
Regression
Chi Square
100
1) The degrees of freedom for a Pearson's Correlation test with a sample of N=45.
What is df = 43?
100
The purpose of regression is not just to find a relationship between two variables, but to __________ the value of one variable from the value of the other.
What is predict?
100
This happens to the critical value of chi-square test if the number of categories is increased.
What is the critical value increase?
200
A college professor reports that students who finish exams early tend to get better grades than students who hold on to exams until the last possible moment. The direction of this relationship is ____________
What is negative?
200
This statistic tells you what proportion of the variability in "y" is explained by "x".
What is r-squared?
200
Chi-Square tests are used with _________ variables, which means that they are _____________ tests.
What is nominal & nonparametric?
300
For a sample of n = 29 individuals, how large a Pearson correlation is necessary to be statistically significant for a two-tailed test with α = .05?
What is .367?
300
When interpreting the output for a regression, the column you use to compare which predictors are stronger than others.
What is beta?
300
Ten years ago, only 15% of the U.S. population consisted of people more than 65 years old. A researcher plans to use a sample of n = 300 people to determine whether the population distribution has changed during the past ten years. If a chi-square test is used to evaluate the data, what is the expected frequency for the older-than-65 category?
What is fe = 45?
400
All of the following are true of correlations EXCEPT: A) The value of a correlation can be affected by the range of the data B) outliers can have a major impact on the value of a correlation C) the value of a correlation can range from -1 to 1 D) All of the above are true
What is D) All of the above are true?
400
You conduct a regression analysis on reaction time and find the following beta weights for three predictors, and determine this predictor to be the highest positive predictor of reaction time: Sugar consumption: beta =.333 Alcohol consumption: beta = -.465 Caffeine consumption: .226
What is sugar consumption?
400
A chi-square test for independence has df = 2. What is the total number of cells in the matrix that were used to classify individuals in the sample?
What is 4 cells?
500
What is the value of the pearson’s correlation for the following information: SP = 9, SSx = 25, SSy = 4.
What is r=.90?
500
The regression line for a scatterplot of X and Y values is found by minimizing __________.
What is the distance from all of the points to the line?
500
A researcher is examining the relationship between color preferences and gender. A sample of 40 men and 60 women is obtained and each person is asked to identify his/her preference between two choices of paint colors for a new student lounge: lime green or electric orange. For this sample, 15 of the men preferred lime green, and 35 of the women preferred also preferred lime green. If a chi-square test is used to evaluate the relationship, what is the expected frequency for men preferring color A?
What is fe 20?