The mean grade on the last
Geometry test was 78. If Kate
scored a 90 and her z-score
wa...
Mathematics, 12.06.2020 09:57 angeisthe72
The mean grade on the last
Geometry test was 78. If Kate
scored a 90 and her z-score
was 2.5, find the standard
deviation for the test.
Answers: 2
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Amachine that produces a special type of transistor (a component of computers) has a 2% defective rate. the production is considered a random process where each transistor is independent of the others. (a) what is the probability that the 10th transistor produced is the first with a defect? (b) what is the probability that the machine produces no defective transistors in a batch of 100? (c) on average, how many transistors would you expect to be produced before the first with a defect? what is the standard deviation? (d) another machine that also produces transistors has a 5% defective rate where each transistor is produced independent of the others. on average how many transistors would you expect to be produced with this machine before the first with a defect? what is the standard deviation? (e) based on your answers to parts (c) and (d), how does increasing the probability of an event aΓ’β Β΅ect the mean and standard deviation of the wait time until success?
Answers: 3
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