Setting Up Tests for Population Mean
AP Statistics · Flashcards · Application
AP STATISTICS · FLASHCARDS
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QUESTION
Compute the standard error when
s
=
10
s = 10
s
=
10
and
n
=
25
n = 25
n
=
25
for a one-sample
t
t
t
test.
QUESTION
Find and correct the error: using
z
=
x
ˉ
−
μ
0
s
n
z = \frac{\bar{x}-\mu_0}{\frac{s}{\sqrt{n}}}
z
=
n
s
x
ˉ
−
μ
0
for a mean test with unknown
σ
\sigma
σ
.
QUESTION
Compute the degrees of freedom for a one-sample
t
t
t
test when
n
=
18
n = 18
n
=
18
.
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ANSWER
d
f
=
17
df = 17
df
=
17
. Apply
d
f
=
n
−
1
=
18
−
1
=
17
df = n - 1 = 18 - 1 = 17
df
=
n
−
1
=
18
−
1
=
17
.
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