Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean mu equals 222 days and standard deviation sigma equals 15 days. What is the probability that a random sample of 26 pregnancies has a mean gestation period of 216 days or less?

The probability that the mean of a random sample of 26 pregnancies is less than 216 days is approximately

And we can find this probability on this way:

Step-by-step explanation:

Let X the random variable that represent the lenghts of the pregnencies of a population, and for this case we know the distribution for X is given by:

Where and

We are interested on this probability

The z score formula is given by:

And if we find the z score we got:

And we can find this probability on this way:

.24

step-by-step explanation:

the probability is   .24

the first player had the highest probability of getting a silver marble

the game could be made fair by adding back the marble that was drawn after each draw

120 seems like the most sensible answer.

step-by-step explanation:

if there is only one topping on all caramel apples and there's 120 of them. then all apples should/will be covered in sprinkles. make sense?