You know that your data has mean = 18 and standard deviation = 2. A) What interval contains all the data within 3 standard deviations of the mean? B) What percentage of the data is in your interval from problem A?

what "following statement"?

step-by-step explanation:

x = 23.78

step-by-step explanation:

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation:

explanation:

remove parenthesis:

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apply rule

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multiply fractions:

=

=

divide:

=

mordancy.