Homework: Section 3.2 Homework Score: 0 of 1 pt 3.2.1 The brain volumes (cm) of

Question

Homework: Section 3.2 Homework Score: 0 of 1 pt 3.2.1 The brain volumes (cm) of s0 brains vary from a low of 922 om2 to a high of 1470 am2 Use the ange nule of thumb to estimate the standard deviation s and compare Hw Score: 0%, 0 of 11 pe 1 Question Hep * the resut to the exact standard deviation of 177.5 om, assuming he estimate is accurate it is witin 1 m The estimated stardard deviaton is on? an (Type an integer or a decimal Do not round) pher is for timedia ourse Tool Enter your arswer in the answer box and then olick Check Answer

Explanation / Answer

The range rule of thumb states that the standard deviation is approximately equal to 1/4th of the range, where the Range is largest value - smallest value.

Here the range = 1470 - 922 = 548. Therefore SD = (1/4) * 548 = 137 cm3.

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