If samples are from a normal distribution with μ = 100 and σ = 10, we expect:
A)about 68 percent of the data within 90 to 110.
B)almost all the data within 80 to 120.
C)about 95 percent of the data within 70 to 130.
D)about half the data to exceed 75.

Question

Quizplus · Accepted Answer

According to the empirical rule, about 68% of data from a normal distribution falls within one standard deviation (σ) of the mean (μ). Here, μ = 100 and σ = 10, so 90 to 110 is within one standard deviation.

If Samples Are from a Normal Distribution with μ =