Which of the following shows a causal relation? You wear your team colors on game day and your team wins.
You go to bed late at night and then have a snow day at school the next day.
You sit up straighter in class and you have more homework that day.
You add more gas to your car and the cost increases.

1. suppose that scores on a knowledge test are normally distributed with a mean of 71 and a standard deviation of 6. a. label the curve: show the mean and the value at each standard deviation: b. if angelica scored a 76 on the test, what is her z-score? (draw her score on the curve above and label) c. what percent of students did angelica score higher than? how can you tell? d. if 185 students took the test, how many students scored higher than angelica?