1. The letter we use to represent an estimated z-score is: x y We can\'t estimat
ID: 3371044 • Letter: 1
Question
1. The letter we use to represent an estimated z-score is:
x
y
We can't estimate a z-score.
t
2. A paired samples t-test produces the following results: t(99) = 2.15, p < .05. The study included participants and the decision was to the null hypothesis. (Note: Your first answer will be a number and your second will be a word.)
3. Which of the following research situations is most likely to use a paired samples design?
None of the situations listed here would use a paired samples design.
A researcher wants to see if a special diet can increase the average IQ in the U.S. population over its current known mean of 100.
A researcher wants to study the effect of a cholesterol-lowering drug on people with high cholesterol.
A researcher wants to study the effects of caffeine on people who consider themselves "night owls" compared to people who consider themselves "early birds".
a.x
b.y
c.We can't estimate a z-score.
d.t
Explanation / Answer
Solution1:
for n<30 it is t and for n>30 it is z
nis sample size
t
OPTION D
Solution2:
n=99+1=100
<0.05
Reject null hypothesis
The study included 100 participants and the decision was to reject the null hypothesis
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