Question: A data set has a mean of 50 and a standard deviation of 10. Which of the following might possibly be true, and which are

A data set has a mean of 50 and a standard deviation of 10.

Which of the following might possibly be true, and which are impossible?

a. More than 10% of the data values are negative.

b. Only 5% of the data values are greater than 70.

c. More than 20% of the data values are less than 30.

d. Less than 75% of the data values are between 30 and 70.

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We can check each statement using the empirical rule which states that for normally distributed data Approximately 68 of the data falls within one sta... View full answer

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