Ask a New Question
Menu

Please Help!!!

I am having a small Problem Working this Problem. I am just not understanding. Could someone please assist?

The lifetime of a brand of DVD player follows a normal distribution with
a mean of 8 years and a standard deviation of 6 months. Find the probability
that the lifetime is more than 7 years.

1 answer

Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.
Similar Questions
    1. answers icon 1 answer
  2. Distracted pedestrians are __________________.Question 42 options: a problem that is growing more serious annually a problem
    1. answers icon 1 answer
  3. Describe the general problem:How do we effectively deliver small food items in this era of heavy traffic and expensive fuel and
    1. answers icon 1 answer
  4. General Problem / ChallengeDescribe the general problem: How do we effectively deliver small food items in this era of heavy
    1. answers icon 1 answer
more similar questions