Please note, this example is NOT in your TI workbook.
Prices, in cents per pound, received by fishermen and vessel owners for various species of fish and shellfish in 1970 and 1980 are listed below. Although there appears to be an overall increase during the decade, is the increase statistically significant? At the .05 level of significance, test the claim that there is an increased price of fish between 1970 and 1980.
| Type of Fish | Price in 1970 | Price in 1980 |
| Cod | 13.1 | 27.3 |
| Flounder | 15.3 | 42.4 |
| Haddock | 25.8 | 38.7 |
| Menhaden | 1.8 | 4.5 |
| Ocean Perch | 4.9 | 23 |
| Salmon, Chinook | 55.4 | 166.3 |
| Salmon, Coho | 39.3 | 109.7 |
| Tuna, Albacore | 26.7 | 80.1 |
| Clams, Soft-Shelled | 47.5 | 150.7 |
| Clams, Blue Hard-Shelled | 6.6 | 20.3 |
| Lobsters, American | 94.7 | 189.7 |
| Oysters, Eastern | 61.1 | 131.3 |
| Sea Scallops | 135.6 | 404.2 |
| Shrimp | 47.6 | 149 |
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