Which of the following is true for most distributions? Question 18 options: Around 70% of the scores will be located within one standard deviation of the mean. Around 50% of the scores will be located within one standard deviation of the mean. Around 90% of the scores will be located within one standard deviation of the mean. Around 30% of the scores will be located within one standardUnder what circumstances would a score that is 10 points below the mean be considered to be an extreme value? Question 19 options: When the standard deviation is much greater than 10 When the mean is much greater than 10 When the standard deviation is much less than 10 When the mean is much less than 10