Post a New Question

MATH

posted by on .

Battery Power Problem. A certain type of thermal battery
for an airplane navigation device backup power has a
mean life of 300 hours with a standard deviation of 15
hours. What proportion of these batteries can be
expected to have lives of 322 hours or less? Assume a normal
distribution of backup power device lives.

  • MATH - ,

    Z = (x - mean)/SD = (322-300)/15

    Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion below the Z score found from above.

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question