[example continued…] For the following data: [µ = 120, σ = 25, n = 25, M = 125],  zM = _______. [note: zM is the z score for the sample mean]

What is the correct conclusion based on the following one sample t test result [t(22) = 4.25, p < .05]

Assume a normal distribution. What is p(z < +2.25)?

Assume a normal distribution. What is p(0 < z < +2.25)?

[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. t =     (test statistic)

[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. SM =

For the following data: [µ = 120, σ = 25, n = 25, M = 125], σM = = ____.

[example continued…] Liam’s  Test                                                 Emma’s Test   Liam’s Score: 90                                          Emma’s Score: 93 Class Average: 84                                       Class Average: 85 Standard Deviation: 2.5                               Standard Deviation: 4 Convert Emma’s score into a score on Liam’s test: 

[example continued…] A normal distribution has a mean of µ = 50 with σ = 10. If a vertical line is drawn through the distribution at X = 55, what proportion of the scores are on the right side of the line?

[example continued…] Liam’s  Test                                                 Emma’s Test   Liam’s Score: 90                                          Emma’s Score: 93 Class Average: 84                                       Class Average: 85 Standard Deviation: 2.5                               Standard Deviation: 4   Convert Liam’s score into a score on Emma’s test: