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6. A pediatrician claims that the standard deviation of the heights of 2-year-old boys is less...

6. A pediatrician claims that the standard deviation of the heights of 2-year-old boys is less than 1.43 inches. A random sample of 11 2-year-old boys revealed that their standard deviation is 1.42 inches. Test the pediatrician’s claim at the 1% level of significance.

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