The t Tests
... The t test for a single sample is for when you know the population mean but not its variance, and where you have a single sample of scores. In most research, you do not even know the population’s mean. And, in most research situations, you have not one set, but two sets of scores. ...
... The t test for a single sample is for when you know the population mean but not its variance, and where you have a single sample of scores. In most research, you do not even know the population’s mean. And, in most research situations, you have not one set, but two sets of scores. ...
1. A "Get Smaller" weight loss program conducted a preliminary
... p-value = .0173 (calculator T-Test) “At the .05 level, there is significant evidence to infer that people that after 4 weeks of the program, the clients’ mean weight decreases.” (for part b) Crit val t = 2.896 so do not reject H0. “At the .01 level, there is not sufficient evidence to that the mean ...
... p-value = .0173 (calculator T-Test) “At the .05 level, there is significant evidence to infer that people that after 4 weeks of the program, the clients’ mean weight decreases.” (for part b) Crit val t = 2.896 so do not reject H0. “At the .01 level, there is not sufficient evidence to that the mean ...
Session #6 - Inferential Statistics & Review
... • An established probability level which serves as the criterion to determine whether to accept or reject the null hypothesis • It represents the confidence that your results reflect true relationships • Common levels in education • p < .01 (I will correctly reject the null hypothesis 99 of 100 time ...
... • An established probability level which serves as the criterion to determine whether to accept or reject the null hypothesis • It represents the confidence that your results reflect true relationships • Common levels in education • p < .01 (I will correctly reject the null hypothesis 99 of 100 time ...
Sampling Distribution with CLT Worksheet
... 4. State police believe that 70% of the drivers traveling on I-10 exceed the speed limit. They plan to set up a radar trap and check the speeds of 80 cars. a) What is the expected proportion of speeding cars? b) What is the standard deviation of the proportion of speeding cars? c) Verify if the appr ...
... 4. State police believe that 70% of the drivers traveling on I-10 exceed the speed limit. They plan to set up a radar trap and check the speeds of 80 cars. a) What is the expected proportion of speeding cars? b) What is the standard deviation of the proportion of speeding cars? c) Verify if the appr ...