1) 113.8 +- 1.41 * 12.3 / sqrt(12) = (108.79, 118.81)
2) Options 1, 2, 4, and 5 are all correct
3) Zbatman=2.33
xbarcritical = 4000 + 2.33 * 900/sqrt(100) = 4209.7
Zsuperman = (4209+.7 – 4309.6)/90 = -1.11
Power = 1-0.1335 = 0.8665
4)
a. Tough to say. Some students argued there was not any patterns distinctive
enough to be a concern. Many saw outliers which suggested normality may be
a concern. Some saw a funnel shape suggesting constant variance could be
violated.
b. 0.70511 +- 1.66 * 0.09926 = (0.5403, 2.353)
5) H0: µ1 ≥ µ2
Ha: µ1 < µ2
α = 0.05
t15=(4.4-5.6) / SQRT{ 1.322/16 + 1.52/16} = -2.4
0.01 < p-value < 0.02
Reject the null
We can say the drivers in Laramie have fewer citations than drivers in Denver
6) Cannot do
7) 2.95 = 1.95 * 15.6/ sqrt(n)
N=(1.96*15.6/2.95)2=107.42
We need 108 two year olds.
8) H0: µ1 = µ2
Ha: µ1 ≠ µ2
α = 0.05
spooled=SQRT{ (49*2.42 + 79*1.82)/(49+79) } = 2.051
t128=(12.2-11.9)/ SQRT{ 2.0512/50 + 2.0512/50} = 0.811
(0.2 < p-value < 0.25) X 2
0.4 < p-value < 0.5
Fail to reject the null
We cannot show the average toxicity of the ingots is different between the two companies
9)
Take the average of people killed
Predicting the probability of finding resources, average zombie lifespans, etc.
To find the probability of human extinction
He tells people how confident he is that they will survive
To find the place where he will be most likely to be safe
To calculate life expectancy for the living human race
To determine when an individual's time is up, based on age activities, etc
They will find the probability that a zombie will follow statistics
To fiddle with the alpha to make everyone feel better about the situation
Calculating the dead
Control Zombies
Ammo manufacturing
nothing
Cannon fodder.
He would be free of his old life's obligations, but then he would find statistics is all he knew. From then on he would wrap
up without end.
I'll take statistician zombies over pretty much any other type of zombie
4 people said bait
Food for zombies to stall them while everyone else escapes
If not the main cause of the outbreak they would probably be considered a delicacy in most zombie 5 star dining
establishments because of their tasty brains