subject
Mathematics, 05.10.2019 10:50 destinyranson

The average lifetime of a light bulb is 3,000 hours with a standard deviation of 696 hours. a simple random sample of 36 bulbs is taken.
a. what are the expected value, standard deviation, and shape of the sampling distribution of ?
b. what is the probability that the average life in the sample will be between 2,670.56 and 2,809.76 hours?
c. what is the probability that the average life in the sample will be greater than 3,219.24 hours?
d. what is the probability that the average life in the sample will be less than 3,180.96 hours?

ansver
Answers: 1

Other questions on the subject: Mathematics

image
Mathematics, 21.06.2019 16:30, macenzie26
What could explain what happened when the time was equal to 120 minutes
Answers: 2
image
Mathematics, 21.06.2019 20:30, jtorres0520
Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?
Answers: 2
image
Mathematics, 21.06.2019 21:00, datgamer13
Mr. zimmerman invested $25,000 in an account that draws 1.4 interest, compouneded annually. what is the total value of the account after 15 years
Answers: 1
image
Mathematics, 22.06.2019 00:30, kadinmorgan
The value, v, of kalani’s stock investments over a time period, x, can be determined using the equation v=750(0.80)^-x. what is the rate of increase or decrease associated with this account? 20% decrease 20% increase 25% decrease 25% increase
Answers: 1
You know the right answer?
The average lifetime of a light bulb is 3,000 hours with a standard deviation of 696 hours. a simple...

Questions in other subjects:

Konu
Mathematics, 18.08.2020 23:01