The life of Sunshine CD players is normally distributed with a mean of 4.1 years and a standard deviation of 1.3 years. A CD player is guaranteed for 3 years. We are interested in the length of time a CD player lasts.

Using the Normal Distribution or Inverse Normal Distribution calculator where appropriate fill in the blanks:

http://onlinestatbook.com/2/calculators/normal_dist.htmlorhttp://onlinestatbook.com/2/calculators/inverse_normal_dist.html

1)Find the probability that a CD player will break down during the guarantee period. Round To one decimal place where appropriate.

P(x<)=

2)Find the probability that a CD player will last between 2.8 and 6 years. Round to 2 decimal places.

P(< x <)=

3)Fill in the blanks:

Find k where k is the 70th percentile of the distribution for the time a CD player lasts.

(Round to one decimal place if necessary)

P( x