This question is based on Excel data caled Bilbayment. Please download the data

Question

This question is based on Excel data caled Bilbayment. Please download the data file by cicking the file name here or from "Excel Data for Final Exam module in Content. The manager of a home oil company would like to investigate the speed with which bills are paid in three suburban areas. He will conduct a further study to find the area where the bills are paid fastest, if the speeds are different Random samples bill is recorded. We do hypothesis testing to answer the following question. of 3 accounts are selected in each area, and the number of days between delivery and payments of the at .05 level of significance, is there statistically significant evidence of difference in the average payment speeds among the three suburban areas? What is the p-value for this hypothesis testing? a) 5.69 b) 0.05 O c) 4.25 d) 0.025

Explanation / Answer

applying one way ANOVA on above given data:

from above p value =0.025

therefore option d is correct

as p value is less then 0.05 level of significance we have sufficient evidence of difference in the average payment speeds among 3 areas.

Groups Count Sum Average Variance area 1 4 24 6 3.333333 area 2 4 46 11.5 7 area 3 4 32 8 6 ANOVA Source of Variation SS df MS F P-value F crit Between Groups 62 2 31.0000 5.6939 0.0252 4.2565 Within Groups 49 9 5.4444 Total 111 11

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