Question

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 in the answer box within your choice. (Round to the nearest integer as needed.) A. If 100 pregnant individuals were selected independently from this population, we would expect nothing pregnancies to last less than 257 days. B. If 100 pregnant individuals were selected independently from this population, we would expect nothing pregnancies to last more than 257 days. C. If 100 pregnant individuals were selected independently from this population, we would expect nothing pregnancies to last exactly 257 days. (b) Suppose a random sample of 17 pregnancies is obtained. Describe the sampling distribution of the sample mean length of pregnancies. The sampling distribution of x overbar is ▼ normal skewed left skewed right with mu Subscript x overbarequals nothing and sigma Subscript x overbarequals nothing. (Round to four decimal places as needed.) (c) What is the probability that a random sample of 17 pregnancies has a mean gestation period of 257 days or less? The probability that the mean of a random sample of 17 pregnancies is less than 257 days is approximately nothing. (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 nearest integer as needed.) A. If 100 independent random samples of size nequals17 pregnancies were obtained from this population, we would expect nothing sample(s) to have a sample mean of exactly 257 days. B. If 100 independent random samples of size nequals17 pregnancies were obtained from this population, we would expect nothing sample(s) to have a sample mean of 257 days or less. C. If 100 independent random samples of size nequals17 pregnancies were obtained from this population, we would expect nothing sample(s) to have a sample mean of 257 days or more. (d) What is the probability that a random sample of 37 pregnancies has a mean gestation period of 257 days or less? The probability that the mean of a random sample of 37 pregnancies is less than 257 days is approximately nothing. (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 nearest integer as needed.) A. If 100 independent random samples of size nequals37 pregnancies were obtained from this population, we would expect nothing sample(s) to have a sample mean of 257 days or less. B. If 100 independent random samples of size nequals37 pregnancies were obtained from this population, we would expect nothing sample(s) to have a sample mean of 257 days or more. C. If 100 independent random samples of size nequals37 pregnancies were obtained from this population, we would expect nothing sample(s) to have a sample mean of exactly 257 days. (e) What might you conclude if a random sample of 37 pregnancies resulted in a mean gestation period of 257 days or less? This result would be ▼ expected, unusual, so the sample likely came from a population whose mean gestation period is ▼ greater than less than equal to 263 days. (f) What is the probability a random sample of size 15 will have a mean gestation period within 11 days of the mean? The probability that a random sample of size 15 will have a mean gestation period within 11 days of the mean is nothing. (Round to four decimal places as needed.)

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Answer #1

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 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 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...

Suppose the lengths of the pregnancies of a certain animal are
approximately normally distributed with mean
mu equals 273 daysμ=273 days
and standard deviation
sigma equals 17 daysσ=17 days.
Complete parts (a) through (f) below.
(a) What is the probability that a randomly selected pregnancy
lasts less than
267267
days?The probability that a randomly selected pregnancy lasts
less than
267267
days is approximately
. 3632.3632.
(Round to four decimal places as needed.)
Interpret this probability. Select the correct choice below...

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 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...

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...

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...

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)

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...

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