Question

A total of 1,000 patients in a fitness study were tested for serum cholesterol. The results indicated a mean of 216.96 milligrams percent and standard deviation of 38.82 milligrams percent. Indicate the values for the following: (compute to one decimal place) –1 standard deviation and +1 standard deviation.

A total of 1,000 patients in a fitness study were tested for serum cholesterol. The results indicated a mean of 216.96 milligrams percent and standard deviation of 38.82 milligrams percent. Indicate the values for the following: (compute to one decimal place)

–2 standard deviations and +2 standard deviations.

Answer 1

a)

= 216.96,  = 38.82

( - 1 * ) , ( + 1 * )

( 216.96 - 1 * 38.82 ) , ( 216.96 + 1 * 38.82)

( 178.14 , 255.78 )

–1 standard deviation and +1 standard deviation = ( 178.1 , 255.8 )

b)

= 216.96,  = 38.82

( - 1 * ) , ( + 1 * )

( 216.96 - 2 * 38.82 ) , ( 216.96 + 2 * 38.82)

( 139.32 , 294.6 )

–2 standard deviation and +2 standard deviation = ( 139.3 , 294.6 )