1. Descriptive Statistics: Cycles to Breakage
Variable
Cycles to Breakage
Mean
222.0
StDev
144.6
Variance
20914.4
Q1
125.8
Median
195.5
Q3
283.5
IQR
157.8
These calculations show us that our dataset has a slight positive skew, since
our median is lower th
1.a. Test of p = 0.08 vs p < 0.08
Sample
1
X
12
N
300
Sample p
0.040000
95% Upper
Bound
0.064004
Exact
P-Value
0.004
From the data given, we conclude that we can reject the null hypothesis. The
alternative is that failures occur less than 8% of the time,
1. One-Sample T: Escape
Test of mu = 360 vs > 360
Variable
Escape
N
26
Mean
370.69
StDev
24.36
SE Mean
4.78
95% Lower
Bound
362.53
T
2.24
P
0.017
I ndividual Value Plot of Escape
(with Ho and 95% t-confidence interval for the mean)
_
X
Ho
320
340
360
380
1. What were the rocket engineers concerned about on the day before the flight, and why? What made
them change their recommendation?
The engineers were concerned that the low temperatures would cause the o-rings to not make a proper
seal. They changed the