The fraction of the numbers in the distribution that are between 50 and 70 is; 95/100
We are given;
Mean = 60
Standard deviation = 5
To find the numbers in the distribution that are between 50 and 70, it means that the numbers are going to be 2 standard deviations from the mean because 2σ = 2 * 5 = 10 which is the difference of both pairs from the mean.
According to empirical rule, 2 standard deviations from the mean is approximately 95/100 or 95%.
Complete question is;
In a certain distribution, the mean is 60 with a standard deviation of 2. At least what traction of the numbers are between the following pair of numbers? At least of the numbers in the distribution are between 50 and 70
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