An experiment was conducted to determine whether any significant differences exi
ID: 3264871 • Letter: A
Question
An experiment was conducted to determine whether any significant differences exist between the strengths of parachutes created by different suppliers. The amount of force needed to tear each parachute was measured based on a tensile-strength scale, and the results for 4 different suppliers are shown below. Five parachutes were tested fro each supplier.
Supplier 1
Supplier 2
Supplier 3
Supplier 4
18.5
26.3
20.6
25.4
24.0
25.3
25.2
19.9
17.2
24.0
20.8
22.6
19.9
21.2
24.7
17.7
18.0
24.5
22.9
20.4
Run an ANOVA test using Microsoft Excel. Let = 0.05.
What is the test statistic value?
Supplier 1
Supplier 2
Supplier 3
Supplier 4
18.5
26.3
20.6
25.4
24.0
25.3
25.2
19.9
17.2
24.0
20.8
22.6
19.9
21.2
24.7
17.7
18.0
24.5
22.9
20.4
Explanation / Answer
applying one way ANOVA through Excel:
from above test stat =3.4961
SUMMARY Groups Count Sum Average Variance Supplier 1 5 97.6 19.52 7.237 Supplier 2 5 121.3 24.26 3.683 Supplier 3 5 114.2 22.84 4.553 Supplier 4 5 106 21.2 8.545 ANOVA Source of Variation SS df MS F P-value F crit Between Groups 62.9775 3 20.9925 3.4961 0.0402 3.2389 Within Groups 96.072 16 6.0045 Total 159.0495 19Related Questions
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