15 A fifth-grade teacher gives homework every night in both math and language arts. The time to complete the math homework has a mean of 30 minutes and a standard deviation of 10 minutes. The time to complete the language arts assignment has a mean of 40 minutes and a standard deviation of 12 minutes. The time to complete the math and the time to complete the language arts homework have a correlation of p = -0.3. The mean time to complete the entire homework assignment: A) is less than 70 minutes since the negative correlation tells you that more time on one assignment will be associated with less time on the second assignment B) is 70 minutes C) is greater than 70 minutes since the measurements are correlated, which raises the mean regardless of the sign of the correlation D) cannot be determined unless the times have a normal distribution E) The answer cannot be computed from the information given