0.1878+-1.66*0.05811 = (0.0913, 0.284)
We are 90% confident the heat transfer rate will increase by 0.181 to 0.195 for every 1cm increase in
coil length.
B) The true average battery power is between 92 and 114 mAh with 80% confidence
H0: mu >= 80
Ha: mu < 80
-2.33=(xbar – 80)/(2/sqrt(36))
Xbar = 79.22
Z= 0.66
Power = 0.7454
10=+-1.81*35/sqrt(n)
N=(1.81*35/10)^2 = 40.13
Need 41 moves
Ho: not stealing (equals)
Ha: stealing
Type 1 error: He is not a thief and you accuse him
Type 2 error: He is a thief and you let him go
If you answer small alpha it needs to be to avoid accusing your supervisor if he’s innocent
If you answer large alpha it needs to be because you want to avoid letting a thief get away.
Cannot do
H0: p >= .1
Ha: p<.1
Alpha=0.05
Z=(13/85-.1)/sqrt(.1*(1-.1)/85) = 3.07
Pvalue = 0.9989
Fail to Reject (Like WAY FTR)
He is not being too lenient
Xbar = (61.5+73.5+51.5+49.5)/5 = 59
S = sqrt([(61.5-59)^2+(73.5-59)^2+(51.5-59)^2+(49.5-59)^2]/(4-1)) = 11
H0: mu = 50
Ha: mu ne 50
Alpha=0.05
T=(59-50)/(11/sqrt(4)) = 1.636
.2 < p-value < .3
Fail to Reject
We cannot show the exam is too long
If it’s a verbal fight, the statistician will win by throwing down confusing, obfuscating info.
Statistician will win because the statistician will sing “Show me the meaning of being an engineer”
Truly engineers have no life. Instead of a fight let’s celebrate what you have got now.
I think that the statistician would win because they have a lot of tricky ways. Playing with numbers that
will make them be able to draw conclusions to convince them. But it won’t be an easy job because it’s
also hard to convince engineers.
Engineer would win the battle of wits
The engineer… they build better weapons
The engineer of course! We can be silent but deadly!
The engineer would rig the bridge that the statistician drives over to get to work
Pig
Engineer, cuz… robots
Both would spend too much time to calculate the other’s weak spot and would forget why they were
fighting in the first place. Then they’d call it even.
The spectators would win. Watching two nerds fight is always comical no matter the outcome
Engineer. Knows how to use fulcrum points to snap your limbs
Trick Question: They would get their friends to fight and pretend they’re watching the mech’s from
Pacific Rim