The percent of the observations that are classified as outliers by the 1.5× rule is the same in any Normal distribution. Which of the following -scores is considered an outlier for a Normal distribution by the 1.5× Rule?
I. = 2.6
II. = −2.7
III. = 2.8

Answer(18);

Psychologists often talk of the magical number "7" - so it is generally assumed that we can keep 7 (more or less, so 5-9 is the correct answer) items in our short term memory - we know this as a result of many experiments.

we can increase this by chunking, so for example "7 8 9 5 3" is harder to remember than "78 95 3" - try it yourself!

the answer is a)

The answer to your question is c