Question

The mean of a set of normally distributed data is 600 with a standard deviation of 20. What percent of the data is between 580 and 620?

The mean of a set of normally distributed data is 600 with a standard deviation of 20. What percent of the data is between 580 and 620?

50%

68%

95%

34%

1. thachthao
68% of the data with a mean of 600 and standard deviation of 20 would lie between 580 and 620

### What is the 68-95-99.7 Rule?

The 68-95-99.7% Rule states that for a normal distribution, about 68% of the values fall within one standard deviation from the mean, 68% of the values fall within two standard deviation from the mean and 99.7% of the values fall within three standard deviation from the mean
Given mean of 600 and a standard deviation of 20. Hence:
68% of the values fall within one standard deviation from the mean = 600 ± 20 = (580, 620)
68% of the data with a mean of 600 and standard deviation of 20 would lie between 580 and 620
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