The personality trait of “Conscientiousness” (someone who is organized, responsible, and can control their impulses) has μ = 110 and σ = 10. Test whether ARC students (n = 25, M = 117) differ on Conscientiousness. α = .05. What type of error could you be making?
Assume a normal distribution. What is p(z < +2.50)?
Assume a normal distribution. What is p(z < +2.50)?
[example continued…] Below is data for two variables, X an…
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) 3 2 -2 -1 4 1 2 4 2 -1 -1 1 1 ___ 6 4 1 ___ 1 1 1 7 4 2 1 ___ 1 2 Positive or negative correlation?
[example continued…] Assume a normal distribution. For the…
Assume a normal distribution. For the following data: , the probability of a sample mean greater than 85, p(M > 85) = _______.
[example continued…] Scenario: I’m interested in whether t…
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 = 116 fe = fo = 84 fe = Bad Outcome fo = 64 fe = fo = 36 fe = The Chi Square test statistic = _____
A normal distribution has a mean of µ = 60 with σ = 5. If a…
A normal distribution has a mean of µ = 60 with σ = 5. If a vertical line is drawn through the distribution at X = 65, what proportion of the scores are on the left side of the line?
[example continued…] Scenario: I’m interested in whether t…
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 = 116 fe = fo = 84 fe = Bad Outcome fo = 64 fe = fo = 36 fe = degrees of freedom, df = ______, and the Chi Square critical boundary = ______
[example continued…] Does training in meditation make a di…
Does training in meditation make a difference for student success? 10 students received training (M1= 88, SS1= 240) and 5 students did not (M2= 82, SS2= 150). Test using α = .05 The correct APA format for the result would include
[example continued…] Is there a difference among the 3 tre…
Is there a difference among the 3 treatments in the table below? Test using α = .05 Treatment A Treatment B Treatment C 2 3 7 ∑X2 = 461 2 3 7 G = 75 3 4 8 N = 15 3 5 8 k = 3 5 5 10 SS1 = 6 SS2 = 4 SS3 = 6 What is the value of the critical F boundary? (from the tables)
[example continued…] Below is data for two variables, X an…
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) 3 2 -2 -1 4 1 2 4 2 -1 -1 1 1 ___ 6 4 1 ___ 1 1 1 7 4 2 1 ___ 1 2 SP = ____