Question

A population of values has a normal distribution with μ=107μ=107
and σ=44σ=44. You intend to draw a random sample of size
n=94n=94.

Find *P*_{12}, which is the score separating the
bottom 12% scores from the top 88% scores.

*P*_{12} (for single values) =

Find *P*_{12}, which is the mean separating the
bottom 12% means from the top 88% means.

*P*_{12} (for sample means) =

Enter your answers as numbers accurate to 1 decimal place. Answers
obtained using exact *z*-scores or *z*-scores rounded
to 3 decimal places are accepted.

Answer #1

A population of values has a normal distribution with
μ=87.4μ=87.4 and σ=41σ=41. You intend to draw a random sample of
size n=106n=106.
Find P6, which is the mean separating the
bottom 6% means from the top 94% means.
P6 (for sample means) =
Enter your answers as numbers accurate to 1 decimal place. Answers
obtained using exact z-scores or z-scores rounded
to 3 decimal places are accepted.

A population of values has a normal distribution with μ=153 and
σ=39.5 You intend to draw a random sample of size n=196
Find P2, which is the score separating the
bottom 2% scores from the top 98% scores.
P2 (for single values) =
Find P2, which is the mean separating the
bottom 2% means from the top 98% means.
P2 (for sample means) =
Enter your answers as numbers accurate to 1 decimal place. Answers
obtained using z-scores rounded to...

A population of values has a normal distribution with
μ=144.2μ=144.2
and
σ=96.9σ=96.9.
You intend to draw a random sample of size
n=47n=47.
Find
P35,
which is the mean separating the bottom 35% means from the top 65%
means.
P35
(for sample means) =
Enter your answers as numbers accurate to 1 decimal place. Answers
obtained using exact
z-scores
or
z-scores
rounded to 3 decimal places are accepted.

A population of values has a normal distribution with
μ=65.3μ=65.3 and σ=42.4σ=42.4. You intend to draw a random sample
of size n=242n=242.
Find P34, which is the mean separating the
bottom 34% means from the top 66% means.
P34 (for sample means) =
Enter your answers as numbers accurate to 1 decimal place. Answers
obtained using exact z-scores or z-scores rounded
to 3 decimal places are accepted.

A population of values has a normal distribution with μ = 245.6
and σ = 59.3 . You intend to draw a random sample of size n = 21.
Find P91, which is the mean separating the bottom 91% means from
the top 9% means. P91 (for sample means) = 100.42
Enter your answers as numbers accurate to 1 decimal place.
Answers obtained using exact z-scores or z-scores rounded to 3
decimal places are accepted.

A population of values has a normal distribution with μ=50 and
σ=98.2. You intend to draw a random sample of size n=13.
Find the probability that a single randomly selected value is
less than -1.7. P(X < -1.7) =
Find the probability that a sample of size n=13 is randomly
selected with a mean less than -1.7.
P(M < -1.7) =
Enter your answers as numbers accurate to 4 decimal places. Answers
obtained using exact z-scores or z-scores rounded
to...

A population of values has a normal distribution with
μ=113.2μ=113.2 and σ=67σ=67. You intend to draw a random sample of
size n=218n=218.
Find the probability that a single randomly selected value is
between 100 and 125.
P(100 < X < 125) =
Find the probability that a sample of size n=218n=218 is randomly
selected with a mean between 100 and 125.
P(100 < M < 125) =
Enter your answers as numbers accurate to 4 decimal places. Answers
obtained using...

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1Info Details
A population of values has a normal distribution with
μ=40.6μ=40.6 and σ=44.1σ=44.1. You intend to draw a random sample
of size n=202n=202.
Find P22, which is the score separating the
bottom 22% scores from the top 78% scores.
P22 (for single values) =
Find P22, which is the mean separating the
bottom 22% means from the top 78% means.
P22 (for sample means) =
Enter your answers as numbers accurate to 1...

A population of values has a normal distribution with
μ=180.3μ=180.3 and σ=46σ=46. You intend to draw a random sample of
size n=174n=174.
Find the probability that a sample of size n=174n=174 is randomly
selected with a mean less than 173.3.
P(M < 173.3) =
Enter your answers as numbers accurate to 4 decimal places. Answers
obtained using exact z-scores or z-scores rounded
to 3 decimal places are accepted.

A population of values has a normal distribution with
μ=114.1μ=114.1 and σ=17σ=17. You intend to draw a random sample of
size n=123n=123.
Find the probability that a sample of size n=123n=123 is randomly
selected with a mean between 110.6 and 112.6.
P(110.6 < M < 112.6) =
Enter your answers as numbers accurate to 4 decimal places. Answers
obtained using exact z-scores or z-scores rounded
to 3 decimal places are accepted.

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