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[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?

[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 = The correct APA format for the result would include

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 = The expected frequency,  fe = ____  

If a hypothesis test produces a z score in the critical region, what decision should be made?

If a study finds that there is a correlation between volunteering behavior and the personality trait of Extroversion, it means that volunteering causes Extroversion.  True or False?

[Example continued…] The average Instagram user spends 30 minutes per day using Instagram (μ = 30), and σ is unknown. Test whether ARC students who are Instagram users (n = 25, M = 24, SS = 2400) differ from the average Instagram user on number of minutes spent using Instagram per day. α = .05. The critical t score boundaries =