What percentage of light bulbs

Assignment Help Basic Statistics

Reference no: EM13102266

If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours?

Reference no: EM13102266

Questions Cloud

Write report for department in hospital-oncology-dermatology : Write down the final five page paper for medical terminology, CEO asked to write the report about 10 different departments in hospital, oncology, dermatology, urology.

Analysis of statistics-probability : In a bag there are 20 marbles. The colors of the marbles are as follows: red - 5; blue - 8; green - 3; yellow - 4.

Infinite population with a mean : iven an infinite population with a mean of 75 and a standard deviation of 12, the probability that the mean of a sample of 36 observations taken at random from this population exceeds 78 is?

Calculating probability from samples : A population consists of 15 items, 10 of which are acceptable. In a sample of 4 items, what is the probability that exactly 3 are acceptable? Assume the samples are drawn without replacement.

What percentage of light bulbs : If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours?

What was the negative charge in coulombs : what was (a) the negative charge in coulombs on one of them and (b) the positive charge in coulombs on the other.

Determining expected value of a random variable : Suppose you want to sell your house and you have decided to accept the first offer exceeding M dollars, say. Assume that the offers are i.i.d. with common distribution F. Find the expected number of offers received before selling the house.

Explain types of contributions must get biggest rewards : What types of contributions must get biggest rewards? Will compensation changes Brainard is initiating probable to undermine firms strengths? What does this case say about performance pay?

Calculating probabilities-dallas cowboys : The odds of the Dallas Cowboys winning this year's Super Bowl are 3 to 1. Compute the probability of the Cowboys winning

User Account

All Pages