image Chapter 6 Case Study: SAT Scores and AP Exam Scores.

The College Board reported in 2013 that females taking the Writing SAT had a mean score of with a standard deviation of , whereas males had a mean score of with a standard deviation of . Assume both sets of scores follow a normal distribution. Use this information for Exercises 44–48.

Question 6.393

image 48.What if the female standard deviation was some unknown value greater than Describe how that change would affect the following:

  3. The difference between and