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 random variable in this problem? Define it in words.
c.What is the probability that the average life in the sample will be between 2,670.56 and 2,809.76 hours?
d.What is the probability that the average life in the sample will be greater than 3,219.24 hours?
e.What is the probability that the average life in the sample will be less than 3,180.96 hours?
Correct Answer:
Verified
View Answer
Unlock this answer now
Get Access to more Verified Answers free of charge
Q108: Thirty percent of a magazine's subscribers are
Q110: A random sample of nine telephone calls
Q111: Missy Walters owns a mail-order business specializing
Q112: The proportion of Americans who support the
Q114: In a local university, 10% of the
Q115: There are 500 employees in a firm,
Q116: Roger Hall, who oversees six Ford dealerships,
Q118: Candidate A is running for president of
Q125: In a large university, 20% of the
Q127: A bank has kept records of the
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents