KIN 232 - mod 10 T-tests

single sample t test

____________ is used when the population standard deviation is not known and are estimating it instead

t distribution

in a t test, sample distribution is described by _______________

true

the t distribution is determined by the degrees of freedom

t or f

z distribution

as sample size (N) increases, the t distribution becomes closer to the ________________

true

as the sample size/df increases, the t value becomes closer to z value

\
t or f

degrees of freedom

the number of values in a set of scores that are free to vary

false

df is calculated by: df=1-N

t or f

hypothesis testing

sampling distribution to establish a range of sample means that reps the population from where the sample came from

false

in a single sample t test, where t-mean is beyond the critical value then a sample came from the same population (no treatment effect exists)

t or f

(sample mean - hypothesized mean)/standard dev

to find the t-mean, we can use the formula

independent t test

this t test is used for 2 separate types of samples

true

independent t test involves using the ratio data or two means

\
t or f

false

cohort studies will often give 2 means for a independent t test

t or f

true

case control studies can give 2 means for an independent t test

t or f

true

independent t test are often used in experimental and quasi-experimental studies

t or f

t-mean (tx)

_______ uses a sampling distribution of means

t-mean 1 - t-mean 2 (tx1-tx2)

_________uses a sampling distribution of mean differences

true

Mu1-M2 (mean) = 0 is the paired scores are from the same population

t or f

true

a larger sample size in sampling distribution of mean differences causes a normal curve

t or f

false

a larger sample size in sampling distribution of mean differences causes a larger distribution variance

t or f

no statistical difference

if p> 0.05 or 0.01 then there is ______________

statistical differences

if p

one tailed

if a hypothesis contains a directional word then the test type is a _________ test

two tailed

if a hypothesis contains no directional word but states a difference, then the test type is a _________ test

true

the independent t test assumes that the two samples are from a normal population

t or f

false

the independent t test assumes that population variances are not ‘similar’ where sample sizes are not equal

t or f

dependent t test

this t test involves using repeated measures as a ratio/interval data that has 2 observations or twins

true

dependent t test uses the difference in scores (D)

t or f

subject variation

using the differences in scores for the same person causes you to account for ______________

true

accounting for subject variation decreases sampling error

t or f

true

in the tD test statistic formula MuD is assumed to be 0

t or f

false

dependent t tests has a decreased power due to a increase in variability

t or f

true

t critical value will increase when using a dependent t test

t or f

false

the increase in magnitude in calculated t statistic is less than the increase in magnitude in the critical t value in a dependent t test

t or f