Question

The mean balance of all checking accounts at a bank on December 31, 2011, was $850. A random sample of 55 checking accounts taken recently from this bank gave a mean balance of $780 with a standard deviation of $230. Using a 1% significance level, can you conclude that the mean balance of such accounts has decreased during this period? Explain your conclusion in words. What if α = .025?


$1.99
Sales0
Views39
Comments0
  • CreatedAugust 25, 2015
  • Files Included
Post your question
5000