A group of adult males has foot lengths with a mean of 28.22 cm and a standard deviation of 1.22 cm. Use the range rule of thumb

Question

A group of adult males has foot lengths with a mean of 28.22 cm and a standard deviation of 1.22 cm. Use
the range rule of thumb to identify the limits separating values that are significantly low or significantly high.
Is the adult male foot length of 25.4 cm significantly low or significantly high? Explain.

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