Homestyle Pizza of Camp Verde, Arizona, provides baking instructions for its premade pizzas. According to the instructions,

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Homestyle Pizza of Camp Verde, Arizona, provides baking instructions for its premade pizzas. According to the instructions, the average baking time is 12 to 18 minutes. If the times are normally distributed, the standard deviation of the times should be approximately 1 minute. A random sample of 15 pizzas yielded the following baking times to the nearest tenth of a minute.
Homestyle Pizza of Camp Verde, Arizona, provides baking instructions for

At the 1% significance level, do the data provide sufficient evidence to conclude that the standard deviation of baking times exceeds 1 minute?

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