Homework 4 Solutions
Math 150
Enrique Trevi
no
3.2:
(a) The table gives P (Z 1.13) = 0.1292. Therefore P (Z > 1.13) = 1 0.1292 =
0.8708.
(b) The table yields P (Z 0.18) = 0.5714.
(c) The table doesnt consider Z > 8 but it does say that P (Z 8) P (Z 3.5) =
Homework 3 Solutions
Math 150
Enrique Trevi
no
2.1:
(a) False. If it is a fair coin, it will be 50% likely to land Heads the next time.
(b) False. There are face cards that are red.
(c) True. No face card is also an Ace.
2.3:
(a) 10 times. The probability
Homework 2 Solutions
Math 150
Enrique Trevi
no
1.39: Plots (1) and (3) show a positive association. (1) is linear and (3) is not. Plot (2)
shows no association. Plot (4) shows a linear negative association.
1.42: The sample mean is 6.25 hours per night. T
Homework 5 Solutions
Math 150
Enrique Trevi
no
4.4:
(a) The point estimate for the average is 171.1. For the median it is 170.3.
(b) For standard deviation: 9.4. For IQR: 177.8 163.8 = 14.
(c) The 180cm person is not unusually tall because, the person is
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Homework 1 Solutions
Math 150
Enrique Trevi
no
1.2 Sinusitis and antibiotics. Researchers studying the effect of antibiotic treatment for
acute sinusitis compared to symptomatic treatments randomly assigned 166 adults diagnosed
with acute sinusitis to one