Blog

[example continued…] Scenario: I’m interested in whether there is a relationship between Team (A vs. B) and Outcome (Good vs. Bad). Below are the data.  Test the null hypothesis that the categories are independent.  α= .05. Team A Team B Good Outcome fo = 35 fe = fo = 55 fe = Bad Outcome fo = 15 fe = fo = 45 fe = The correct APA format for the result would include

[example continued…] Below is data for two variables, X and Y.  Answer the questions that follow.  X Y X-MX Y-MY (X-MX)2 (Y-MY)2 (X-MX)(Y-MY) 0 4 -3 -1 9 1 3 2 3 -1 -2 1 4 ___ 4 7 1 ___ 1 4 2 6 6 3 1 ___ 1 3 Positive or negative correlation?

[example continued…] Scenario: 100 people were asked, “Who is your favorite superhero?” Below are the data.  Test the null hypothesis that the population frequencies for each category are equal.  α= .05. Iron Man Black Panther Wonder Woman Spiderman fo = 20 fo = 30 fo =30 fo = 20 fe = fe = fe = fe = degrees of freedom, df = ______, and the Chi Square critical boundary = ______

[example continued…] Below is data for two variables, X and Y.  Answer the questions that follow.  X Y X-MX Y-MY (X-MX)2 (Y-MY)2 (X-MX)(Y-MY) 0 4 -3 -1 9 1 3 2 3 -1 -2 1 4 ___ 4 7 1 ___ 1 4 2 6 6 3 1 ___ 1 3 SSX = _____; SSY = _____

[example continued…] Given the following data: SP = 100; SSX = 20; MY = 125; MX = 10 Predict Ŷ given X = 4

[example continued…] Below is data for two variables, X and Y.  Answer the questions that follow.  X Y X-MX Y-MY (X-MX)2 (Y-MY)2 (X-MX)(Y-MY) 0 4 -3 -1 9 1 3 2 3 -1 -2 1 4 ___ 4 7 1 ___ 1 4 2 6 6 3 1 ___ 1 3 SP = ____

[example continued…] Scenario: I’m interested in whether there is a relationship between Team (A vs. B) and Outcome (Good vs. Bad). Below are the data.  Test the null hypothesis that the categories are independent.  α= .05. Team A Team B Good Outcome fo = 35 fe = fo = 55 fe = Bad Outcome fo = 15 fe = fo = 45 fe = What is the correct result based on the data?

[example continued…] Below is data for two variables, X and Y.  Answer the questions that follow.  X Y X-MX Y-MY (X-MX)2 (Y-MY)2 (X-MX)(Y-MY) 0 4 -3 -1 9 1 3 2 3 -1 -2 1 4 ___ 4 7 1 ___ 1 4 2 6 6 3 1 ___ 1 3 What is the missing value under the (X-MX)(Y-MY) column? (far right column)

Scenario: I’m interested in whether there is a relationship between Team (A vs. B) and Outcome (Good vs. Bad). Below are the data.  Test the null hypothesis that the categories are independent.  α= .05. Team A Team B Good Outcome fo = 35 fe = fo = 55 fe = Bad Outcome fo = 15 fe = fo = 45 fe = The expected frequency, fe , for the Team A X Good Outcome category = _____

Does training in study skills make a difference for student success?  8 students received training (M1= 85, SS1= 100) and 8 students did not (M2= 80, SS2= 124). Test using α = .05   Which is the null hypothesis, H0?