Question

Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean ? = 283 days and standard deviation ? = 23 days. Complete parts (a) through (f) below. from this population, we would expect sample(s) to have a sample mean of exactly 276 days. B. If 100 independent random samples of size n = 18 pregnancies were obtained from this population, we would expect 10 sample(s) to have a sample mean of 276 days or less. C. If 100 independent random samples of size n = 18 pregnancies were obtained from this population, we would expect sample(s) to have a sample mean of 276 days or more. (d) What is the probability that a random sample of 71 pregnancies has a mean gestation period of 276 days or less? The probability that the mean of a random sample of 71 pregnancies is less than 276 days is approximately . (Round to four decimal places as needed.)

          Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean ? = 283 days and standard deviation ? = 23 days. Complete parts (a) through (f) below.
from this population, we would expect sample(s) to have a sample mean of exactly 276 days.
B. If 100 independent random samples of size n = 18 pregnancies were obtained from this population, we would expect 10 sample(s) to have a sample mean of 276 days or less.
C. If 100 independent random samples of size n = 18 pregnancies were obtained from this population, we would expect sample(s) to have a sample mean of 276 days or more.
(d) What is the probability that a random sample of 71 pregnancies has a mean gestation period of 276 days or less?
The probability that the mean of a random sample of 71 pregnancies is less than 276 days is approximately .
(Round to four decimal places as needed.)

Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean ? = 283 days and standard deviation ? = 23 days. Complete parts (a) through (f) below.
from this population, we would expect sample(s) to have a sample mean of exactly 276 days.
B. If 100 independent random samples of size n = 18 pregnancies were obtained from this population, we would expect 10 sample(s) to have a sample mean of 276 days or less.
C. If 100 independent random samples of size n = 18 pregnancies were obtained from this population, we would expect sample(s) to have a sample mean of 276 days or more.
(d) What is the probability that a random sample of 71 pregnancies has a mean gestation period of 276 days or less?
The probability that the mean of a random sample of 71 pregnancies is less than 276 days is approximately .
(Round to four decimal places as needed.)

Added by Montserrat G.

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