The brain volumes (cm3 of 20 brains have a mean of 1169.8 cm3 and a standard dev

Question

The brain volumes (cm3 of 20 brains have a mean of 1169.8 cm3 and a standard deviation of 126.2 cm3. Use 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 1452.2 cm be significantly high? Significantly low values are cm 3 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.) s 14522 cm3 significantly high? OA. No, because it is above the upper limit separating value. O B. Yes, because it is above the upper limit separating value. OC. No, because it is between the limits separating values 0 D. Yes, because it is between the limits separating values. O E. No, because it is below the lower limit separating value. O F. Yes, because it is below the lower limit separating value.

Explanation / Answer

Significantly low value = 1169.8 - 2*126.2 = 917.4 cm3 or lower

Significantly high value = 1169.8 + 2*126.2 = 1422.2 cm3 or higher

Yes, 1452.2 is significantly high because it is above the upper limit seperating value. Option B is correct.

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