The brain volumes (cm cubed

cm3) of 20 brains have a mean of 1189.2

1189.2 cm cubed

cm3 and a standard deviation of 127.3

127.3 cm cubed

cm3. Use the given standard deviation and the range rule of thumb to identify the limits separating values that are significantly low or significantly high. For such data, would a brain volume of 1423.8

1423.8 cm cubed

cm3 be significantly high?

Significantly low values are

nothing

cm cubed

cm3 or lower.

Significantly low values are

nothing

cm cubed

cm3 or lower.