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A leakage test was conducted to determine the effectiveness of a seal designed to keep
Chapter 6, Problem 6.1-2(choose chapter or problem)
A leakage test was conducted to determine the effectiveness of a seal designed to keep the inside of a plug airtight. An air needle was inserted into the plug, which was then placed underwater. Next, the pressure was increased until leakage was observed. The magnitude of this pressure in psi was recorded for 10 trials: 3.1 3.5 3.3 3.7 4.5 4.2 2.8 3.9 3.5 3.3 Find the sample mean and sample standard deviation for these 10 measurements.
Questions & Answers
QUESTION:
A leakage test was conducted to determine the effectiveness of a seal designed to keep the inside of a plug airtight. An air needle was inserted into the plug, which was then placed underwater. Next, the pressure was increased until leakage was observed. The magnitude of this pressure in psi was recorded for 10 trials: 3.1 3.5 3.3 3.7 4.5 4.2 2.8 3.9 3.5 3.3 Find the sample mean and sample standard deviation for these 10 measurements.
ANSWER:Step 1 of 4
Sample size
Refer to the box for sample size
Serial number |
Sample value(x) |
|
1 |
3.1 |
9.61 |
2 |
3.5 |
12.25 |
3 |
3.3 |
10.89 |
4 |
3.7 |
13.69 |
5 |
4.5 |
20.25 |
6 |
4.2 |
20.25 |
7 |
2.8 |
7.84 |
8 |
3.9 |
15.21 |
9 |
3.5 |
12.25 |
10 |
3.3 |
10.89 |
total |
35.8 |
130.52 |
