Solution Found!
Use a normal probability plot to assess whether the sample
Chapter 3, Problem 11AYU(choose chapter or problem)
Problem 11AYU
Use a normal probability plot to assess whether the sample data could have come from a population that is normally distributed. O-Ring Thickness A random sample of O-rings was obtained, and the wall thickness (in inches) of each was recorded.
0.276 |
0.274 |
0.275 |
0.274 |
0.277 |
0.273 |
0.276 |
0.276 |
0.279 |
0.274 |
0.273 |
0.277 |
0.275 |
0.277 |
0.277 |
0.276 |
0.277 |
0.278 |
0.275 |
0.276 |
Questions & Answers
QUESTION:
Problem 11AYU
Use a normal probability plot to assess whether the sample data could have come from a population that is normally distributed. O-Ring Thickness A random sample of O-rings was obtained, and the wall thickness (in inches) of each was recorded.
0.276 |
0.274 |
0.275 |
0.274 |
0.277 |
0.273 |
0.276 |
0.276 |
0.279 |
0.274 |
0.273 |
0.277 |
0.275 |
0.277 |
0.277 |
0.276 |
0.277 |
0.278 |
0.275 |
0.276 |
ANSWER:
Answer :
Step 1 :
From the Excel
> arrange x - values in ascending order
> calculate , i is the position of the data
> find z score for each
> plot x - values on the horizontal axis and the corresponding z-score on the vertical axis
x |
position |
= |
Z - value |
0.273 |
1 |
0.030864 |
-1.86824 |
0.273 |
2 |
0.080247 |
-1.40341 |
0.274 |
3 |
0.12963 |
-1.12814 |
0.274 |
4 |