business statistics II An experiment was conducted to determine whether any sign

Question

business statistics II

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 2 26.3 25.3 24.0 21.2 24.5 Supplier3 20.6 25.2 20.8 24.7 22.9 Supplier 4 25.4 19.9 22.6 17.7 20.4 Supplier 1 18.5 17.2 19.9 18.0 Run an ANOVA test using Microsoft Excel. Let 0.05 Whatis your conclusion? O There are no significant differences in the strengths of parachutes from different suppliers O There are differences in strengths of parachutes between all of the suppliers O There are differences in strengths of parachutes between at least 2 of the suppliers O Inconclusive

Explanation / Answer

The statistical software output for ANOVA test is:

Analysis of Variance results:
Data stored in separate columns.

Column statistics

ANOVA table

Since p - value < 0.05, we reject the null hypothesis and conclude that atleast 2 of the suppliers are different from each other.

Hence,

Option C is correct.

Column n Mean Std. Dev. Std. Error Supplier 1 5 19.52 2.6901673 1.2030794 Supplier 2 5 24.26 1.9191144 0.85825404 Supplier 3 5 22.84 2.133776 0.95425364 Supplier 4 5 21.2 2.9231832 1.3072873

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