The following are the prices (in dollars) of the same brand of camcorder found at eight stores
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Los Angeles.
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a. Using the formula from Chapter 3, find the sample variance, s2, for these data.
b. Make the 95% confidence intervals for the population variance and standard deviation. Assume that the prices of this camcorder at all stores in Los Angeles follow a normal distribution.
c. Test at a 5% significance level whether the population variance is different from 750 square dollars.
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