A stockbroker at Critical Securities reported that the mean rate of return on a sample of 10 oil stocks was 12.6% with a standard deviation of 3.9%. The mean rate of return on a sample of 8 utility stocks was 10.9% with a standard deviation of 3.5%.

At the 0.05 significance level, can we conclude that there is more variation in the oil stocks?(Round your answer to 2 decimal places.)

The test statistic is.

Decision:

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