Question: Money magazine reports percentage returns and expense ratios for stock and bond funds. The following data are the expense ratios for 10 midcap stock funds, 1 0 small-cap stock funds, 10 hybrid stock funds, and 10 specialty stock funds (Money, March 2003).

Midcap Small-Cap Hybrid Specialty

1.2 2.0 2.0 1.6

1.1 1.2 2.7 2.7

1.0 1.7 1.8 2.6

1.2 1.8 1.5 2.5

1.3 1.5 2.5 1.9

1.8 2.3 1.0 1.5

1.4 1.9 0.9 1.6

1.4 1.3 1.9 2.7

1.0 1.2 1.4 2.2

1.4 1.3 0.3 0.7

Use α= .05 to test for any significant difference in the mean expense ratio among the four

types of stock funds