1. Sampling Distribution for Proportions
Based on Binomial ……

2. Properties of Sampling Distributions for Sample Proportions

3. Formulas Needed for Proportions…..

4. Example……
Based on past experience, a bank believes that 7% of the people who receive loans will not make payments on time. The bank has recently approved 200 loans. What is the probability that over 10% of these clients will not make timely payments?

5. Answer……
You are finding
Shade the normal distribution curve

6. Example……
Based on past experience, the government found that 8% of the people default on their student loans. The school approved 190 loans. Find the probability that more than 10% will default.

7. Answer……
Find
Shade the curve to the right with an area of 10% or

8. Example……
We expect to sell about 500 tickets to the game and we think that 20% will be children’s tickets. What is the probability that less than 15% are children?

9. Answer……
Find
Shade the area of .15 to the left of the distribution.