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Descriptive Stats
Inferential stats
Null Hypothesis
What test to use?
ANOVA
100
The mode is the only measure of central tendency used with
What is nominal data
100
In statistics you try to reject________.
What is the null hypothesis
100
Dr. Urn is investigating the relationship between the number of hours someone uses the computer and the number of headaches each subject experiences in a 40 hour work week. What type of statistical analysis will Dr. Um use?
What is Pearson correlation
100
In an ANOVA the calculated F tells you__.
What is the main effect of your independent variable.
200
The measure of central tendency used when there are extreme scores involved is__
What is the median
200
A standard score represents the number of __that a score falls above or below the mean.
What is standard deviation units
200
A type II error occurs when you___.
What is fail to reject the null hypothesis when it is false & needs rejecting.
200
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
200
Dr. Hind used a One-Way ANOVA, repeated measures and has set his alpha level at .05 nondirectional. He reported the following: F(2, 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.
300
When using inferential statistics the __ & __is reported in the results section.
What is mean & SD
300
If you want to compare how well you performed on an English exam compared with your psychology exam you need to convert both into a?
What is standard score
300
A type I error occurs when____.
What is rejecting the null hypothesis when it is TRUE.
300
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.
300
The reason(s) why a One-way ANOVA is used to compare 3 or more means and not several t- tests is because
What is too time consuming & increases chance of type I error.
400
When calculating the SD to compare 2 groups you need to use the __
What is unbias formula
400
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.
400
Dr. JK reports that a new drug AARP helps people over 50 improve their short-term memory. However, in reality it does not. JK has committed a___error.
What is Type I
400
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.
500
When the mean of the distribution is greater than the median it is ____skewed.
What is positively
500
After collecting data you want to compare the population mean (mu) with your sample mean. Therefore you would calculate the ____.
What is SEM (standard error of the mean)
500
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.
500
Dr. Jung is studying how being a night owl vs morning person effects their GPA. However. he wants to add a 3rd group labelled other who wake up at 8am and stay up to 11pm. What type of statistical test should he use?
What is One-way ANOVA between subjects
500
In a One-way analysis of variance, what factors influence Within group variability? What about between group variability?
What is sampling error & individual difference Between= sampling error & effect of IV