# Question

The following are the prices (in dollars) of the same brand of camcorder found at eight stores in

Los Angeles.

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.

Los Angeles.

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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