Assume the random variable X is normally distributed with mean
=50 and standard deviation =7. Find the 77 th percentile.
The mean incubation time of fertilized eggs is 2020 days.
Suppose the incubation times are approximately normally distributed
with a standard deviation of 11 day.
(a) Determine the 15th percentile for incubation times.
(b) Determine the incubation times that make up the middle
95%.
Assume that the random variable x is normally
distributed with mean μ = 70 and standard deviation
σ = 10. Find P(x < 82)
a. 0.9942
b. 0.4500
c. 0.1151
d. 0.8849
1)Assume that the random variable X is normally distributed,
with mean μ = 70 and standard deviation σ = 13.
A)Find P(X ≤ 65) =
B) Find P(X > 55) =
C) Find P(X > 78) =
D) Find P(X > 78) =
2)The length of zebra pregnancies is normally distributed, with
mean μ = 380 and standard deviation σ = 10.
A)Find P(X < 365) =
B)Find P(X > 385) =
Let X be normally distributed with mean μ = 26 and standard
deviation σ = 13. [You may find it useful to reference the z
table.]
a. Find P(X ≤ 0). (Round "z" value to 2 decimal places and final
answer to 4 decimal places.)
b. Find P(X > 13). (Round "z" value to 2 decimal places and
final answer to 4 decimal places.)
c. Find P(13 ≤ X ≤ 26). (Round "z" value to 2 decimal places and
final...
Let X be normally distributed with mean μ = 146 and standard
deviation σ = 34. [You may find it useful to reference the z
table.]
a. Find P(X ≤ 100). (Round "z" value to 2 decimal places and
final answer to 4 decimal places.)
b. Find P(95 ≤ X ≤ 110). (Round "z" value to 2 decimal places
and final answer to 4 decimal places.)
c. Find x such that P(X ≤ x) = 0.330. (Round "z" value and...
Let X be normally distributed with mean μ = 18
and standard deviation σ = 8. [You may find it
useful to reference the z table.]
a. Find P(X ≤ 2). (Round
"z" value to 2 decimal places and final
answer to 4 decimal places.)
b. Find P(X > 4).
(Round "z" value to 2 decimal places and final
answer to 4 decimal places.)
c. Find P(8 ≤ X ≤ 16).
(Round "z" value to 2 decimal places and final...
et X be normally distributed with mean μ = 3.3
and standard deviation σ = 1.8. [You may find it
useful to reference the z table.]
a. Find P(X > 6.5).
(Round "z" value to 2 decimal places and final
answer to 4 decimal places.)
b. Find P(5.5 ≤ X ≤ 7.5).
(Round "z" value to 2 decimal places and final
answer to 4 decimal places.)
c. Find x such that P(X
> x) = 0.0485. (Round "z" value
and...
Let X be normally distributed with mean μ = 20 and standard
deviation σ = 12. [You may find it useful to reference the z
table.]
a. Find P(X ≤ 2). (Round "z" value to 2 decimal places and final
answer to 4 decimal places.)
b. Find P(X > 5). (Round "z" value to 2 decimal places and
final answer to 4 decimal places.)
c. Find P(5 ≤ X ≤ 20). (Round "z" value to 2 decimal places and
final...