1. Homework: pg. 500 #41, 42, 47, 52 41.)a. Mean is 31 seconds.
No. The mean is not affected by the standard deviation
The standard deviation is seconds
42.) a. Normal, with a mean of 350 and a standard deviation of b

2. 47.) A. mean=550; standard deviation=5.7009
B. mean= =0; standard deviation= (stays the same)
mean=9/5*550+32=1022;
standard deviation=9/5*(5.7009)=  
52.) The distribution is Normal, with a mean of 0 and standard deviation of The Prob. that the scores differ by more than 5 points is