Independent t-test
Which statistic is typically reported for an independent t-test result?
What is t-value
In statistics you try to reject________.
What is the null hypothesis
MJ wants to determine if a lack of sleep causes an increase in heart rate. He wants you advice on what statistical design to use an independent t or correlated t-test.
What is a correlated t-test.
In a Correlated t-test the calculated t tells you__.
What is the inference of the relationship
When would you use an independent t-test rather than a paired t-test?
What is When comparing two groups of different people
What are the assumptions of a Independent t- test
What is 2 levels of the independent Variable ( control vs Treatment Men vs women) Assumes normal distribution n=30 +Homogeneity of Variance
The advantage of using a independent t-test__.
What is use 2 different groups pretest, order effects are not a factor.
AJ was hired by the police department to determine the average # of drivers that go through stop signs in the Sacramento area. He will then compare this to the national average. What test should AJ use?
What is one-sample t-test
Dr. Hind used a correlated t-test and has set his alpha level at .05 nondirectional. He reported the following: t(19)=6.99, p< 0.05.. Based on this information what can you conclude?
What is there's a main effect of his independent V.
When using inferential statistics the __ & __is reported in the results section.
What is mean & SD
If a researcher wants to compare how well students performed on an English exam compared with the same students taking a psychology exam you would use a___
What is correlated t-test
A disadvantage of a Independent t-test____.
What is need more subjects than a correlated t-test
Jane is studying the effects of listening to music on an ipod while studying for an exam (n=30) compared with a control group of subjects (n=30) asked not to listen to music or use an Ipod. All subjects took the same exam & studied the same notes. What Statistical test should Jane use?
What is Independent t-test.
The reason(s) why a Correlated or Independent l t- tests is because
What is two levels of the Independent variable
If you conduct an independent t-test and obtain a p-value of 0.04 (α = 0.05), what do you conclude
What is Reject the null hypothesis; there is a significant difference
When using parametric test such as a t-test to analyze data there are 3 assumptions which includes__, __ &__.
What is normal distribution, homogeneity of variance, dependent variable is quantitative in nature.
Dr. JK reports that a new drug AARP helps people over 50 improve their short-term memory. His result are based on 25 people taking the drug and 25 not taking drug and matched them on age. What statistical test should he use?
What is correlated t-test
In Jane's study her adviser for her thesis told her to match subjects on their GPA then divide them into groups. Can she use the same statistical test?
What is no now she needs to use a correlated t-test because subjects were matched on GPA.
Jane's results indicate the t-value is 3 and her df is 28 what is her eta-squared?
What is .24
Which of the following is a key assumption of the independent t-test?
What is The variances in both groups are equal, Between subjects design, dependent variable is on interval ratio scale of measurement
The null hypothesis (H₀) in a correlated t-test states that:
What is The means of the two related groups are equal
Dr. Wu is testing an anti-depressant drug on clinically depressed (n=25) patients and concludes this drug does not work p=.09, What is the problem with his conclusion?
What is he has a type II error & needs more subjects.
Dr. Jung is studying how being a night owl vs morning person effects their GPA. She has the entire group take a test at 8am than next day at 5pm. What type of statistical test should he use?
What is Independent t-test
How do you determine the nature of the relationship in a correlated & Independent t-tests?
What is examine the means