Question

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?

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(a) The proportion of pregnancies that last more than

259259

days is

nothing.

Answer #1

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?
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Click the icon to view a...

The lengths of a particular animal's pregnancies are
approximately normally distributed, with mean muequals254 days and
standard deviation sigmaequals8 days. (a) What proportion of
pregnancies lasts more than 268 days? (b) What proportion of
pregnancies lasts between 248 and 256 days? (c) What is the
probability that a randomly selected pregnancy lasts no more than
246 days? (d) A "very preterm" baby is one whose gestation
period is less than 234 days. Are very preterm babies unusual?

The lengths of a particular animal's pregnancies are
approximately normally distributed, with mean muequals252 days and
standard deviation sigmaequals20 days. (a) What proportion of
pregnancies lasts more than 282 days? (b) What proportion of
pregnancies lasts between 247 and 262 days? (c) What is the
probability that a randomly selected pregnancy lasts no more than
242 days? (d) A "very preterm" baby is one whose gestation
period is less than 222 days. Are very preterm babies unusual?

The lengths of a particular animal's pregnancies are
approximately normally distributed, with mean μ=262 days and
standard deviation σ=16 days.
(a) What proportion of pregnancies lasts more than 282
days?
(b) What proportion of pregnancies lasts between234 and 266
days?
(c) What is the probability that a randomly selected pregnancy
lasts no more than 246 days?
(d) A "very preterm" baby is one whose gestation period is
less than 238 days. Are very preterm babies unusual?

The lengths of a particular animal's pregnancies are
approximately normally distributed, with mean equals 274 days and
standard deviation sigma equals 12 days. (a) What proportion of
pregnancies lasts more than 280 days? (b) What proportion of
pregnancies lasts between 268 and 283 days? (c) What is the
probability that a randomly selected pregnancy lasts no more than
256 days? (d) A "very preterm" baby is one whose gestation
period is less than 247 days. Are very preterm babies unusual?

The lengths of a particular animal's pregnancies are
approximately normally distributed, with mean μ=265 days and
standard deviation σ=12 days.
(a) What proportion of pregnancies lasts more than 271
days?
(b) What proportion of pregnancies lasts between 262 and 274
days?
(c) What is the probability that a randomly selected pregnancy
lasts no more than 244 days?
(d) A "very preterm" baby is one whose gestation period is
less than 238 days. Are very preterm babies unusual?

The lengths of a particular animal's pregnancies are
approximately normally distributed, with mean μ=261 days and
standard deviation σ=20 days.
(a) What proportion of pregnancies lasts more than 296
days?
(b) What proportion of pregnancies lasts between 256 and 266
days?
(c) What is the probability that a randomly selected
pregnancy lasts no more than 251 days?
(d) A "very preterm" baby is one whose gestation period is
less than 231 days. Are very preterm babies unusual?

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...

The lengths of a particular animal's pregnancies are
approximately normally distributed, with mean muequals264 days and
standard deviation sigmaequals8 days. (a) What (c) What is the
probability that a randomly selected pregnancy lasts no more than
260 days? (d) A "very preterm" baby is one whose gestation
period is less than 244 days. Are very preterm babies unusual?

The lengths of a particular animal's pregnancies are
approximately normally distributed, with mean mu equals 259 days
and standard deviation sigma equals 16 days. (a) What proportion
of pregnancies lasts more than 263 days? (b) What proportion of
pregnancies lasts between 255 and 267 days? (c) What is the
probability that a randomly selected pregnancy lasts no more than
247 days? (d) A "very preterm" baby is one whose gestation
period is less than 235 days. Are very preterm babies...

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