Mathematics, 15.12.2021 03:40, eksdeeexe
The average lifetime of a light bulb is 3000 hours with a standard deviation of 696 hours.
A simple random sample of 36 bulbs is taken.
(a) What is the expected value, standard deviation, and shape of the sampling distribution of ?
(b) What is the probability that the average lifetime in the sample will be between 3670.56 and 3809.76 hours?
(c) What is the probability that the average life time in the sample will be equal to or greater than 3219.24 hours?
(d) What is the probability that the average lifetime in the sample will be equal to or less than 3180.96 hours?
(e) How large of a sample needs to be taken to provide a 0.01 probability that the average life time in the sample will be equal to or greater than 3219.24 hours
Answers: 3
Mathematics, 21.06.2019 19:00, lexipooh7894
What are the solutions of the system? y = x^2 + 2x +3y = 4x - 2a. (-1, -6) and (-3, -14)b. (-1, 10) and (3, -6)c. no solutiond. (-1, -6) and (3, 10)
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The radius of the circle below intersects the unit circle at (3/5,4/5). what is the approximate value of theta? 0.6 radians 1.0 radians 36.9 degrees 53.1 degrees
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Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is . reset next
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Mathematics, 21.06.2019 22:30, student176
Acampus club held a bake sale as a fund raiser, selling coffee, muffins, and bacon and eggs sandwiches. the club members charged $1 for a cup of coffee, 3$ for a muffin , and $4 for a back. and egg sandwich. they sold a total of 55 items , easing $119. of the club members sold 5 more muffins than cups of coffee, how many bacon and egg sandwiches heβs did they sell
Answers: 1
The average lifetime of a light bulb is 3000 hours with a standard deviation of 696 hours.
A simpl...
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