Question

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 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 more than 185 days.

B. If 100 pregnant individuals were selected independently from this population, we would expect ( ) nothing pregnancies to last exactly 185 days.

C. If 100 pregnant individuals were selected independently from this population, we would expect ( ) nothing pregnancies to last less than 185 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 bar is ▼( skewed right, skewed left, normal) with mu Subscript x overbarμxequals=nothing and sigma Subscript x overbarσxequals=nothing. (Round to four decimal places as needed.)

Answer #1

**
If 100 pregnant individuals were selected independently from this
population, we would expect
nothing pregnancies to last less than 185 days.**

The sampling distribution of
is
with _{
}

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 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 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 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 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 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...

The lengths of a particular animal's pregnancies are
approximately normally distributed, with mean muequals276 days and
standard deviation sigmaequals16 days. (a) What proportion of
pregnancies lasts more than 300 days? (b) What proportion of
pregnancies lasts between 268 and 288 days? (c) What is the
probability that a randomly selected pregnancy lasts no more than
248 days? (d) A "very preterm" baby is one whose gestation
period is less than 240 days. Are very preterm babies unusual?
The proportion of...

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...

The lengths of a particular animal's pregnancies are
approximately normally distributed, with mean
muμequals=265265
days and standard deviation
sigmaσequals=1616
days.(a) What proportion of pregnancies lasts more than
285285
days?(b) What proportion of pregnancies lasts between
253253
and
273273
days?(c) What is the probability that a randomly selected
pregnancy lasts no more than
237237
days?(d) A "very preterm" baby is one whose gestation period
is less than
229229
days. Are very preterm babies unusual?
LOADING...
Click the icon to view a...

The lengths of a particular animal's pregnancies are
approximately normally distributed, with mean
muμequals=256256
days and standard deviation
sigmaσequals=1212
days.(a) What proportion of pregnancies lasts more than
259259
days?(b) What proportion of pregnancies lasts between
241241
and
262262
days?(c) What is the probability that a randomly selected
pregnancy lasts no more than
238238
days?(d) A "very preterm" baby is one whose gestation period
is less than
226226
days. Are very preterm babies unusual?
LOADING...
Click the icon to view a...

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