Problem 35

435-2(384)=-333

pnorm(-333,435,384)
## [1] 0.02275013

  1. this means that 2.27 percent of recivers would be running neagtive 333 yards.

  2. The problem here is that clearly no receivers will be running negative years, so our prediciton is wrong. We cant use th enormal model here since the data is highly skewed and non symetric

Problem 37

N(1152,84)

  1. 87.8 th percentile, so 100 - 87.8 = 12.2 %

  2. 71.6 th percentile

  3. 23.3 %

Problem 39

N(1152,84)

  1. 1259.6 pounds

  2. 1081.3 pounds

  3. 1107.9 - 1196.0 pounds

Problem 41

N(1152,84)

  1. 1130.7 pounds

  2. 1347.4 pounds

  3. IQR = 1208.7 - 1095.3 = 113.4 pounds

Problem 47

50.9 mean, 54, 0.28/0.72

z=0.582

  1. 0.52=(54/50.9)/s =5.3 grams

  2. N(67.1,x)

z=2.05

2.05=(0.54-67.1)/x =6.7

  1. The younger eggs are more consistant with their weight.