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Worksheets113-2 Ｂ班統計期中複習
Total questions: 10
Worksheet time: 5mins
Compared to independent-measures designs, repeated-measures designs reduce the variance by removing individual differences.
O
X
An independent-measures study with n = 20 scores in each condition will
produce an independent-measures t statistic with df = 18.
O
X
The correct alternative hypothesis for a one-tailed repeated-measures t test is
μ ≠ 0
O
X
A matched-subjects research design is a type of repeated-measures research design because the participants in each treatment condition are the same people.
O
X
One advantage of a repeated-measures research design is that it typically requires fewer participants than an independent-measures design.
O
X
Which of the following is the correct null hypothesis for an independent-measures t test?
μ1-μ2≠0
M1-M2≠0
μ1-μ2=0
M1-M2=0
An independent-measures research study uses n = 15 participants in one group
and n = 12 participants in a second group to compare two treatment conditions.
What is the df value for the t statistic computed for the corresponding hypothesis test?
df=27
df=24
df=25
df=26
An independent-measures study comparing two treatment conditions produces a t
statistic with df = 16. If the two samples are the same size, how many participants
were in each of the samples?
n=9
n=10
n=8
n=18
A researcher uses a repeated-measures study to compare two treatment conditions with a set of 20 scores in each treatment. What is the value of df for the repeated-measures t statistic?
df=18
df=19
df=38
df=39
The narrower the confidence interval, the more precise it is. Which combination of factors will produce the most precise estimate of the difference between two population means?
two samples of n = 20 and 80% confidence
two samples of n = 20 and 90% confidence
two samples of n = 50 and 80% confidence
two samples of n = 50 and 90% confidence
