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Name the Sample Design
Computations
Tables
100
Standard deviation of a sample (uses N for the denominator in the equation)
What is S?
100
As N gets larger, standard error gets _____
What is smaller?
100
Identical twins were raised apart in different environments. They were compared for attitude toward education.
What is a natural pair?
100
S-hat=1.1, N=38; Standard error
What is .18?
100
t-distribution; N=2, alpha=.10, two-tailed test
What is 6.314?
200
Standard deviation of a population
What is σ?
200
As standard error decreases, a z-score _________
What is increases?
200
Aggressive encounters by children playing with worn and broken toys were measured. They then watched other children playing with new toys. Then the children resumed playing with worn toys and aggressive encounters were counted
What is repeated measures?
200
X-bar=39.3, μ=48.0, S-hat=11; effect size d
What is -.79?
200
t-distribution; N=85, alpha=.05, two-tailed test
What is 1.990?
300
Estimate of a population's variability (estimate of sigma)
What is s-hat?
300
As a z-score increases, the probability ________
What is decreases?
300
Patients with seasonal affective disorder spent two hours a day under bright artificial light. Depression scores were recorded before and after.
What is repeated measures?
300
μ=9, σ=5, N=7; Proportion of sample means greater than 7
What is .8554?
300
Normal curve; z=1.70, z to infinity
What is 0.0446?
400
Mean of a population
What is μ?
400
The fewer the df, the ____ the t-value that is required to separate out the extreme 5% of the curve
What is larger?
400
One group was deprived of REM sleep and the other was not. Participants were randomly assigned one treatment. Participants filled out a questionnaire the day after.
What is an independent sample?
400
X-bar=7, μ=5.2, SE=.6112; probability of sample mean or greater
What is 0.0016?
400
Pearson product-moment correlation coefficients; N=3, alpha=0.05, two-tailed test
What is .99692?
500
Mean value of a random variable over an infinite number of samplings
What is E(X-bar)?
500
The t-distribution has a ______ standard deviation than does the z-distribution
What is larger?
500
Applicants to a limited size class were selected by flipping a coin. GPA at graduation was compared between students who got in and students who didn't.
What is an independent sample?
500
X-bar=85.00, σ=10.75, N=25; Lower-limit of the 95% CI
What is 80.56?
500
Helps to obtain an unbiased sample
What is a random numbers table?