Question

7. Suppose the lengths of pregnancies of a certain animal are approximately normally distributed with mean 108 days and standard deviation 9 days. a. What is the probability that a random sample of size 4 will have a mean length of pregnancies of more than 112 days? b. What is the probability that a random sample of size 10 will have a mean length of pregnancies of more than 112 days? c. If the length of pregnancies from part a or b were not normally distributed to begin with, could we still answer the question? Why or why not?

Answer #1

Suppose the lengths of the pregnancies of a certain animal are
approximately normally distributed with mean mu equals 190 days and
standard deviation sigma equals 14 days
Complete parts (a) through (f) below.
(a) What is the probability that a randomly selected pregnancy
lasts less than 185 days?
(b) Suppose a random sample of 20 pregnancies is obtained.
Describe the sampling distribution of the sample mean length of
pregnancies.
c) What is the probability that a random sample of 20...

Suppose the lengths of pregnancies of a certain animal
are approximately normally distributed with mean ? = 240 days and ?
= 18 days.
a. What is the probability that a randomly selected pregnancy
lasts less than 233 days?
b. Suppose a random sample of 17 pregnancies is obtained.
Describe the mean and standard deviation of the distribution of the
sample mean length of pregnancies.
c. What is the probability that a random sample of 17
pregnancies has a mean...

suppose the lengths of the pregnancies of a certain animal are
approximately normally distributed with μ=170 days and σ=17
what is the probability a random sample size 17 will have a
mean gestation period within 12 days of the mean (round to four
decimal places)

11. Suppose the lengths of the pregnancies of a certain animal
are approximately normally distributed with mean μ=286 days and
standard deviation sigma equals σ=29 days.
Complete parts (a) through (f) below.
I cannot figure out part (f), please help.
(f) What is the probability a random sample of size 18 will
have a mean gestation period within 11 days of the mean?
The probability that a random sample of size 18 will have a mean
gestation period within 11...

Suppose the lengths of the pregnancies of a certain
animal are approximately normally distributed with mean 217 days
and the standard deviation 12 days.
(a) What is the probability that a randomly selected pregnancy
lasts less than 213 days?
The probability that a randomly selected pregnancy lasts less
than
213 days is approximately ?(Round to four decimal places as
needed.)
Interpret this probability. Select the correct choice
below and fill in the answer box within your choice.
(Round to the...

Suppose the lengths of the pregnancies of a certain animal are
approximately normally distributed with mean mu equals 263 days and
standard deviation sigma equals 15 days. Complete parts (a)
through (f) below. (a) What is the probability that a randomly
selected pregnancy lasts less than 257 days? The probability that
a randomly selected pregnancy lasts less than 257 days is
approximately nothing. (Round to four decimal places as needed.)
Interpret this probability. Select the correct choice below and
fill...

Suppose the lengths of the pregnancies of a certain animal are
approximately normally distributed with mean
mu equals 147 daysμ=147 days
and standard deviation
sigma equals 12 daysσ=12 days.
Complete parts (a) through (f) below.Click here to view the
standard normal distribution table (page 1).
LOADING...
Click here to view the standard normal distribution table (page
2).
LOADING...
(a) What is the probability that a randomly selected pregnancy
lasts less than
143143
days?The probability that a randomly selected pregnancy lasts...

Suppose the lengths of the pregnancies of a certain animal are
approximately normally distributed with mean μ=162 days and
standard deviation σ=10 days.
Complete parts (a) through (f) below.
(a) What is the probability that a randomly selected pregnancy
lasts less than
159 days?The probability that a randomly selected pregnancy
lasts less than 159 days is approximately .3821
(Round to the nearest integer as needed.)
A.If 100 pregnant individuals were selected independently from
this population, we would expect ___pregnancies to...

Suppose the lengths of the pregnancies of a certain animal are
approximately normally distributed with a mean
μ=192 days and a standard deviation of σ=19 days. Complete parts
(a) through (f) below.
(a) What is the probability that a randomly selected pregnancy
lasts less than 185 days?
The probability that a randomly selected pregnancy lasts less
than 185 days is approximately nothing. (Round to four decimal
places as needed.)
Interpret this probability. Select the correct choice below and
fill in...

12- Suppose the lengths of the pregnancies of a certain animal
are approximately normally distributed with a mean equals 271 days
and σ=26 days. About 35% of the pregnancies period of 64-pregnancy
samples are between 279 and x days. Find x.

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