The records the results of an experiment designed to measure the effect of deter

Question

The records the results of an experiment designed to measure the effect of detergent brand (A, B, C, D) and washing cycle time (18, 20, 22, 24 minutes) on the amount of dirt removed from standard household laundry loads. At 0.05 level of significance: Excel file here: https://drive.google.com/file/d/0B41Z5suN4j28d2xRYWVCX2UxTm8/view?usp=sharing

a. Is there a significant effect due to detergent brand?

b. Is there a significant effect due to washing cycle time?

c. Is there a significant interaction effect between detergent brand and washing cycle time?

Explanation / Answer

Using this Excel Output:

samples are detergent brand,

columns are washing cycle time

a)

From Anova Table:

For sample: P-Value is 0.9999

Therefore, P-value > 0.05, That is Fail to Reject Ho at 5% level of significance.

Therefore, There is a Not significant effect due to detergent brand.

b)

P-Value < 0.05, i.e 0 < 0.05, That is Reject Ho at 5% level of significance.

Therefore, There is significant effect due to washing cycle time.

C)

P-value > 0.05, i.e 0.99999 > 0.05, That is Fail to Reject Ho at 5% level of significance.

Therefore, there is Not significant interaction effect between detergent brand and washing cycle time

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