**Question 1**

Question 2

Question 3

Suppose a random survey is conducted of 21 U.S. mothers who recently weaned their children. The average weaning age was 9 months with a standard deviation of 4 months. Conduct a hypothesis test to determine is the average weaning age in the U.S. is less than 12 months old. Use a 5% level of confidence.

In your answer, show your hypothesis, your calculated z or t score, and your decision to accept or not accept the null hypothesis.

which of the following statements regarding pascal’s triangle are correct

Answer to question 1

Answer to question 1

Answer to question 2

Options B and D are the correct answers to this problem.

The explanation for option B: The Pascal triangle is built in the shape of a triangle. It is a triangular array of numbers, these numbers are the binomial coefficients.

In this triangular form, each row is longer than the previous one by strictly one element and the value of each element is the sum of elements just above left and above right the current element (if these exists).

In this way, the first and last element of any row of the Pascal triangle is always 1.

For example, the 6th element of row 8 = the 5th element of row 7 + the 6th element of row 7.

Answer to question 3