Which of the following is true for most distributions? a. Around 50% of the scores will be located within one standard deviation of the mean. b. Around 70% of the scores will be located within...

a. Around 50% of the scores will be located within one standard deviation of the mean.

b. Around 70% of the scores will be located within one standard deviation of the mean.

c. Around 30% of the scores will be located within one standard deviation of the mean.

d. Around 90% of the scores will be located within one standard deviation of the mean.