3
3
The brain volumes (cm³) of 20 brains have a mean of 1095.5 cm³ and a standard deviation of 122.1 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 1299.7 cm³ be significantly high?
Significantly low values are cm or lower.
(Type an integer or a decimal. Do not round.)
Significantly high values are
cm³ or higher.
(Type an integer or a decimal. Do not round.)
Is 1299.7 cm³ significantly high?
A. No, because it is between the limits separating values.
B. Yes, because it is above the upper limit separating value.
C. No, because it is below the lower limit separating value.
D. Yes, because it is below the lower limit separating value.