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Home Q & A Board Science-Related Homework Help Mathematics
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lingo lingo
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6 years ago
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?
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irina99irina99
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6 years ago
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lingo Author
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6 years ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
jblazah
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Yesterday
Just got PERFECT on my quiz
Evolution
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2 hours ago
Thanks
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