Answer:
0.1172 is the probability that the life span of the monitor will be more than 19,141 hours.
Explanation:
We are given the following information in the question:
Mean, μ = 17,000
Variance = 3,240,000
Standard deviation, σ = 1800
We are given that the distribution of life spans is a bell shaped distribution that is a normal distribution.
Formula:
P(life span of the monitor will be more than 19,141)
P(x > 19141)
Calculation the value from standard normal z table, we have,
0.1172 is the probability that the life span of the monitor will be more than 19,141 hours.