Mathematics, 13.10.2019 23:30 weirdojuwin
Scores on a recent national statistics exam were normally distributed with a mean of 80 and a standard deviation of 6. a. what is the probability that a randomly selected exam will have a score of at least 71? b. what percentage of exams will have scores between 89 and 92? c. if the top 2.5% of test scores receive merit awards, what is the lowest score eligible for an award? d. if there were 334 exams with scores of at least 89, how many students took the exam? e. what is the median of the population of the recent national statistics exam?
Answers: 1
Mathematics, 21.06.2019 15:00
"princess tower" in dubai is considered the world's tallest residential building, towering to 1 0 1 101 floors! t ( n ) t(n) models the number of tenants living on floor n n of the tower. what does the statement t ( 2 0 ) = t ( c ) t(20)=t(c) mean?
Answers: 2
Mathematics, 21.06.2019 16:30
You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:
Answers: 1
Mathematics, 21.06.2019 16:30
What is the difference between regular convex and concave polygons
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Mathematics, 21.06.2019 17:20
Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers.a) one of the 400 passengers is selected uniformly at random.let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem
Answers: 3
Scores on a recent national statistics exam were normally distributed with a mean of 80 and a standa...
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