Question

Let x be a continuous random variable that has a normal distribution with μ=85 and σ=12. Assuming n/N ≤ 0.05, find the probability that the sample mean, x¯, for a random sample of 18taken from this population will be between 81.7 and 90.4.

Round your answer to four decimal places.

Answer #2

Refer Standard normal table/Z-table to find the probability OR
use excel formula "**=NORM.S.DIST(1.9092, TRUE)**"
& "**=NORM.S.DIST(-1.1667, TRUE)**" to find the
probability.

answered by: anonymous

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Find the probability that a single randomly selected value is
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P(136<X<140.6)=
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P(25.1<X<57.5)=
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A population of values has a normal distribution with
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What is the mean of the distribution of sample means?
μ¯x=μx¯=
What is the standard deviation of the distribution of sample
means? Round your answer to two decimal places.
σ¯x=σx¯=
Q14

Suppose x has a distribution with μ = 12 and
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μx, σx
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probability to four decimal places.)
μx =
σx =
P(12 ≤ x ≤ 14) =
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and P(12 ≤ x ≤ 14). (Round
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Answer to 4 decimal places.

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