A chemistry class has learned how to read a sensitive high-caliber balance scale

Question

A chemistry class has learned how to read a sensitive high-caliber balance scale (this is not a digital scale). Since most students are very good at reading the scale, the instructor decides it’s time to test their skills. The instructor asks each student to weigh the same 1.6 ounce bag of Peanut M&Ms, and then records each student’s reading of the balance scale. Which histogram shows the distribution of the students’ balance-scale readings?

Which of the following statements is valid?

Histogram I

Histogram II

Histogram III

Histogram IV

Explanation / Answer

records each student’s reading of the balance scale.

it is normal distribution,

it should be symmetric.

From given histogram

Histogram II follow normal distribution.

ANSWER:

Histogram II

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