Approximately 50% of all observations for a normally distributed random variable fall in the interval: a u (+/-) .67o b u (+/-) o c u (+/-) 2o d u (+/-) 3o answer is a but i cant come up with it. besides intuitively knowing that it should be less than one, how can you come up with that answer?? that o = std dev schweser pg 269 quant study book question 27. answer gives no clarification
68-95-99% => 1-2-3 sd. Just remember that rule. Even if you didn’t know the exact answer, process of elimination would have led you to (a).
yes, i was just wondering how they got .67 cause i cant come up with that number
You need z-tables or some computer program