Question

A group of adult males has foot lengths with a mean of 27.64

cm and a standard deviation of 1.39

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 24.7 cm significantly low or significantly​ high? Explain.

Significantly low values are ______ cm or lower.

Answer 1

Solution:-

Given that,

mean = = 27.64 cm

standard deviation = = 1.39 cm

Using the range rule of thumb,

Significantly low = - 2

Significantly low = 27.64 - 2 * 1.39

Significantly low = 24.86 cm

Significantly high = + 2

Significantly high = 27.64 + 2 * 1.39

Significantly high = 30.42 cm

Is the adult male foot length of 24.7 cm significantly low, because values are 24.86 cm or lower