Draw Inferences From Random Samples
7th Grade Math · Flashcards
7TH GRADE MATH · FLASHCARDS
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QUESTION
What is the formula for the mean of a sample with values
x
1
,
x
2
,
…
,
x
n
x_1, x_2, \dots, x_n
x
1
,
x
2
,
…
,
x
n
?
QUESTION
If many simulated samples give results between
0.47
0.47
0.47
and
0.53
0.53
0.53
, what is a reasonable prediction interval?
QUESTION
Which sample is more likely to give a stable estimate:
n
=
20
n=20
n
=
20
or
n
=
200
n=200
n
=
200
?
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ANSWER
n
=
200
n=200
n
=
200
. Larger samples reduce sampling variability and give more stable estimates.
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