The data are repeated here (next column). You used the small-sample t-statistic to form a confidence interval for the difference between the mean trap-spacing measurements of the two fishing cooperatives. This method requires the variance of the population of trap spacing's for the BT cooperative, (σBT)2, to be the same as the population variance for the PA cooperative, (σPA)2.

a. Set up the null and alternative hypotheses for testing the equality of variances.
b. Find the sample variances for the two cooperatives.
c. Compute the test statistic.
d. Find the approximate p-value of the test.
e. Make the appropriate conclusion using α = .01.
For Information: Refer to the Bulletin of Marine Science (April 2010) study of lobster trap placement. Exercise 8.12.

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BT Cooperative: 93 99 105 94 82 70 86 PA Cooperative: 118 94 106 72 90 66 153 98