Question:

In 2016, it was reported that 6% of all first-time mothers were 19 years old. Suppose a sample of 400 new mothers is chosen

e. Find the probability that the proportion of a sample of 400 first-time mothers that are 19 years old is between than 6.5% and 7.5%.

f. Find the proportion of a sample of 400 first-time mothers that are 19 years old above which 15% of all proportions of samples of 400 first-time mothers that are 19 years old fall.

g. Find the proportion of a sample of 400 first-time mothers that are 19 years old below which 60% of all proportions of samples of 400 first-time mothers that are 19 years old fall.

h. Find the proportions of a sample of 400 first-time mothers that are 19 years old between which the middle 85% of all proportions of samples of 400 first-time mothers that are 19 years old fall

A sample of size n is taken from a population with an unknown distribution, with mean and standard deviation . Which of the following statements about the sample mean distribution is true? Select one: O a. without Using the Central Limit Theorem, Xexactly followsX- Nu. 0 b. Using the Central Limit Theorem, Xexactly followsX - N(J.-) C. Using the Central Limit Theorem, Xapproximately follows