Mathematics, 11.12.2019 21:31 allieballey0727
In the following problem, check that it is appropriate to use the normal approximation to the binomial. then use the normal distribution to estimate the requested probabilities. 1) more than a decade ago, high levels of lead in the blood put 84% of children at risk. a concerted effort was made to remove lead from the environment. now, suppose only 8% of children in the united states are at risk of high blood-lead levels.
(a) in a random sample of 216 children taken more than a decade ago, what is the probability that 50 or more had high blood-lead levels? (round your answer to three decimal places.)
(b) in a random sample of 216 children taken now, what is the probability that 50 or more have high blood-lead levels? (round your answer to three decimal places.
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Now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.
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Mathematics, 21.06.2019 22:50
Which statement accurately describes how to perform a 90° clockwise rotation of point a (1,4) around the origin?
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In the following problem, check that it is appropriate to use the normal approximation to the binomi...
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