1. An Example of {AND, OR, Given that} Using a Normal Distribution

2. Consider the following problem
Consider the following problem. The length of human pregnancy in days, has an average of 266 days, and a standard deviation of 16 days. The distribution is normal. Let the random variable X denote the length of a human pregnancy.

3. Consider the following problem
Consider the following problem. The length of human pregnancy in days, has an average of 266 days, and a standard deviation of 16 days. The distribution is normal. Let the random variable X denote the length of a human pregnancy.
Let event A be a pregnancy lasts between 266 days and 298 days.
Let event B be a pregnancy lasts between 250 days 282 days.
Let event C be a pregnancy lasts 234 days or less.

4. No, they share the common days 266 to 282.
Consider the following problem. The length of human pregnancy in days, has an average of 266 days, and a standard deviation of 16 days. The distribution is normal. Let the random variable X denote the length of a human pregnancy.
Let event A be a pregnancy lasts between 266 days and 298 days.
Let event B be a pregnancy lasts between 250 days 282 days.
Let event C be a pregnancy lasts 234 days or less.
1. Are events A and B disjoint?
No, they share the common days 266 to 282.

5. Yes, they do not share any common days.
Consider the following problem. The length of human pregnancy in days, has an average of 266 days, and a standard deviation of 16 days. The distribution is normal. Let the random variable X denote the length of a human pregnancy.
Let event A be a pregnancy lasts between 266 days and 298 days.
Let event B be a pregnancy lasts between 250 days 282 days.
Let event C be a pregnancy lasts 234 days or less.
1. Are events B and C disjoint?
Yes, they do not share any common days.

6. Consider the following problem
Consider the following problem. The length of human pregnancy in days, has an average of 266 days, and a standard deviation of 16 days. The distribution is normal. Let the random variable X denote the length of a human pregnancy.
Let event A be a pregnancy lasts between 266 days and 298 days.
Let event B be a pregnancy lasts between 250 days 282 days.
Let event C be a pregnancy lasts 234 days or less.
1. Calculate P(B OR C)