Question

score on last try: 0.33 of 1 pts. see details for more. at least one scored part is incorrect. jump to first changable incorrect part. > next question get a similar question you can retry this question below according to national testing data, college math class testing times are normally distributed with a of 45 minutes and standard deviation 3 minutes. the bell curve below represents the probability distribution for testing times. the scale on the horiz axis is equal to the standard deviation. fill in the three indicated boxes. μ = 45 σ = 3

Explanation:

Step1: Recall normal - distribution properties

In a normal distribution, the mean $\mu = 45$ and standard deviation $\sigma=3$. The values on the horizontal axis are spaced by the standard - deviation.
The value to the left of the mean by one standard - deviation is $\mu-\sigma$.
$\mu-\sigma=45 - 3=42$.

Step2: Find the value to the right of the mean

The value to the right of the mean by one standard - deviation is $\mu+\sigma$.
$\mu+\sigma=45 + 3=48$.

Answer:

Left box: 42, Right box: 48