Central Limit Theorem Practice

A&X Electrical makes a lamp. The Research department found that the life of the lamp is normally distributed with a mean of 5000 hours and a standard deviation of 450 hours.

1. What is the probability a sample of 10 lamps will have a mean life less than 4950 hours?

2. What is the probability a sample of 10 lamps will have a mean between 5025 hours and 5050 hours?

Question

Central Limit Theorem Practice

A&X Electrical makes a lamp.  The Research department found that the life of the lamp is normally distributed with a mean of 5000 hours and a standard deviation of 450 hours.

1. What is the probability a sample of 10 lamps will have a mean life less than 4950 hours?

2. What is the probability a sample of 10 lamps will have a mean between 5025 hours and 5050 hours?

anonymous · Answer

i just need 1. answered i know how to do #2