H.W. # 3 Solutions
1.
Sample average:
19
xi x
i 1
19
272.82 19
14.359 min
Sample variance:
19
xi
i 1 19
272.82
xi2 10333.8964
i 1
n n
2
xi x
2 i i 1
s2
i 1
n
10333.8964 19 1
272.82 19
2
n 1 6416.49 356.47 (min) 2 18
Sample standa
Treatment of Data
Outline: 1. 2. 3. 4. 5. 6. Data Summary and Display Random Sampling Stem-and-Leaf Diagram Box Plots Time Sequence Plots Probability Plots
1
1 Data Summary and Display
Definition
(1)
2
1 Data Summary and Display
Example 1
3
1
Random Experiment: Different outcomes are obtained in repeated trials. Sources of Variability: Manufacturing Process; Environment; Measurement Instrument; Purity; Heat input. Sample Space: The set of all possible outcomes in a random experiment. Disc