A bank has historically found that the average monthly charges
A bank has historically found that the average monthly charges in
recent years on its credit card were $1,350. With an improving economy, they suspect that this has increased. A sample of 42 customers resulted in an average monthly charge of $1,376.54 with a standard deviation of $183.89. Does this data provide statistical evidence that the average monthly charges have increased?
***See attachment***
I need help finding the following information:
-t-statistic
-one tailed t-value
-two tailed t- value (+ and -)
Hypothesis test results
-Lower one-tailed test
-Critical t-value
-p-value
-Conclusion
-Upper one-tailed test
-Critical t-value
-p-value
-Conclusion
-Two-tailed test
-Critical t-value (+ and -)
-p-value
-Conclusion