Question

A sample of ?=14n=14 observations is drawn from a normal population with ?=990μ=990 and ?=210σ=210. Find each of the following:

A. ?(?¯>1113)P(X¯>1113)

Probability =

B. ?(?¯<877)P(X¯<877)

Probability =

C. ?(?¯>967)P(X¯>967)

Probability =

Answer #1

A sample of n=14 observations is drawn from a normal population
with μ=1030 and σ=200. Find each of the following:
A. P(X¯>1110)
Probability =
B. P(X¯<944)
Probability =
C. P(X¯>997)
Probability =
THANK YOU!!

A sample of ?=24
observations is drawn from a normal population with ?=1000 and
?=240. Find each of the following:
A. ?(?¯>1097)
Probability =
B. ?(?¯<906)
Probability =
C. ?(?¯>990)
Probability =

A sample of n=15 observations is drawn from a normal population
with μ=1060 and σ=150. Find each of the following:
A. P(X¯>1137)
Probability =
B. P(X¯<982)
Probability =
C. P(X¯>1009)
Probability =

A sample of n=23 observations is drawn from a normal population
with μ=960 and σ=160. Find each of the following:
A. P(X¯>1013)
I have a general idea of how to get the z- score, but am having
trouble moving forward from there.

A random sample of 100 observations was drawn from a normal
population. The sample variance was calculated to be s^2 = 220.
Test with α = .05 to determine whether we can infer that the
population variance differs from 300. Use p-value (from chi-square
table) and critical value

A random sample of n=36 observations is drawn from a population
with a mean equal to 60 and a standard deviation equal to 36.
a. Find the probability that x? is less than 48 ____
b. Find the probability that x? is greater than 63____
c. Find the probability that x? falls between 48 and 78 ____

A sample of size 8 will be drawn from a normal population with
mean 61 and standard deviation 14.
(a) Is it appropriate to use the normal distribution to find
probabilities for x?
(b) If appropriate find the probability that x will be between
51 and 71. Round the answer to four decimal places.
(c) If appropriate find the 81st percentile of x.
Round the answer to two decimal places.

If the random variable X is drawn from a normal population with
?=155 and ?=11, find each of the following:
A. ?(?>168)
Probability =
B. ?(?<136)
Probability =
C. ?(150<?<160)
Probability =

A random sample of n=81 observations is drawn from a population
with a mean equal to 57 and a standard deviation equal to 54, find
the probability if x is less than 51, x is greater than 66, and if
x falls between 51 and 63

A random sample of 25 observations is to be drawn from a
population with the mean of 40 and a standard deviation of 25. The
probability that the mean of the sample will exceed 45 is:
a.Not possible to compute
b. 0.4772
c. 0.4207
d. 0.0228

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