for data with a bell - shaped distribution, we are promised (a) (b) of the data is within 3 standard…

for data with a bell - shaped distribution, we are promised (a) (b) of the data is within 3 standard deviations of the mean.\n(a) choose the correct choice for a word in blank (a) in the above statement.\na. at most\nb. exactly\nc. about\nd. at least\n(b) choose the correct choice for a percentage in blank (b) in the above statement.\na. 68%\nb. 75%\nc. 89%\nd. 95%\ne. 99.7%

for data with a bell - shaped distribution, we are promised (a) (b) of the data is within 3 standard deviations of the mean.\n(a) choose the correct choice for a word in blank (a) in the above statement.\na. at most\nb. exactly\nc. about\nd. at least\n(b) choose the correct choice for a percentage in blank (b) in the above statement.\na. 68%\nb. 75%\nc. 89%\nd. 95%\ne. 99.7%

Answer

Brief Explanations:

For a bell - shaped (normal) distribution, the empirical rule states that about 99.7% of the data lies within 3 standard deviations of the mean. The word used is "about".

Answer:

(a) C. about (b) E. 99.7%