# Question: Repeat the preceding exercise using the prices of regular gas

Repeat the preceding exercise using the prices of regular gas and the prices of mid-grade gas. Gas Prices Gas prices have been very volatile in recent years. The table below lists gas prices (dollars per gallon) at randomly selected Connecticut stations at the time of this writing. Is there sufficient evidence to conclude that there is a linear correlation between prices of regular gas and prices of premium gas? For the gas stations that sometimes post only the price of regular gas, can you use those prices to get a good sense of the price of premium gas?

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