When Mrs. Myles gave a test, the scores were normally distributed with a mean of 72 and a standard deviation of 8. This means that 95% of her students scored between which two scores?

A) 40 and 100

B) 48 and 96

C) 56 and 88

D) 64 and 80

Respuesta :

95% are within 2 standard deviations of the mean, that is, 72∓2×8. The appropriate choice is ...
  C) 56 and 88