# Answer to Question #26478 in Statistics and Probability for Bacchus

Question #26478

Use a 0.05 level of significance for all statistical tests:

7.A statistical test to see whether the proportion of customers who would recommend the Credit Union to their friends have increased as a result of the pilot,

8.A 90% confidence interval for the difference of the proportions, before and after the pilot, of customers who would recommend the Credit Union to their friends.

7.A statistical test to see whether the proportion of customers who would recommend the Credit Union to their friends have increased as a result of the pilot,

8.A 90% confidence interval for the difference of the proportions, before and after the pilot, of customers who would recommend the Credit Union to their friends.

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