Question: How do you find the p-value for this problem? In a random sample of 20 homeowners in Anytown, the average monthly electric bill during June

How do you find the p-value for this problem?

In a random sample of 20 homeowners in Anytown, the average monthly electric bill during June was $64. The sample standard deviation was $11. Assume electric bills are approximately normally distributed. The manager of the Anytown Power Plant believes that the variance of June monthly electric bills is 100 ($ squared). Test whether the variance of June monthly electric bills is 100 or it is different at a 10% level of significance

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