In a recent national survey, the meanweekly allowance for a nine-year-old child from his or her parents was reported to be $3.65. A random sampleof 45 nine-year-olds in northwestern Ohio revealed the mean allowance to be $3.69 with a standard deviationof .24. At the .05 level of significance, is there a difference in the mean allowances nationally and the mean allowances in northwestern Ohio for nine-year-olds?
The complete, neat and step-by-step solution is provided in the attached Excel file. We conclude that there is no sufficient evidence.