A sample of 50 student ages is taken from a bell-shaped population with a mean age (µ) of 21.2 years and standard deviation (o) of 2.8 years. Using the empirical rule, approximately 68% of the sample mean student ages (x) to 1 decimal place should be found in the interval between: A) 18.4 years and 24.0 years B) 20.4 years and 22.0 years C) 15.6 years and 26.8 years D) 20.8 years and 21.6 years E) 20.0 years and 22.4 years

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A sample of 50 student ages is taken from a bell-shaped population with a mean age (µ) of 21.2
years and standard deviation (ơ) of 2.8 years. Using the empirical rule, approximately 68% of the
sample mean student ages (x ) to 1 decimal place should be found in the interval between:
A) 18.4 years and 24.0 years
B) 20.4 years and 22.0 years
C) 15.6 years and 26.8 years
D) 20.8 years and 21.6 years
E) 20.0 years and 22.4 years
Transcribed Image Text:A sample of 50 student ages is taken from a bell-shaped population with a mean age (µ) of 21.2 years and standard deviation (ơ) of 2.8 years. Using the empirical rule, approximately 68% of the sample mean student ages (x ) to 1 decimal place should be found in the interval between: A) 18.4 years and 24.0 years B) 20.4 years and 22.0 years C) 15.6 years and 26.8 years D) 20.8 years and 21.6 years E) 20.0 years and 22.4 years
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