Young's modulus is a quantitative measure of stiffness of an elastic material. Suppose that for metal sheets of a particular type, its mean value and standard deviation are 85 GPa and 2.3 GPa, respectively. Suppose the distribution is normal. (Round your answers to four decimal places.) (a) Calculate P(84 ≤ X ≤ 86) when n = 16. .9812 Incorrect: Your answer is incorrect. (b) How likely is it that the sample mean diameter exceeds 86 when n = 25

Cor d? ? me ? 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.

Which of the following transformations will always produce a congruent figure?

What is the length of the segment, endpoints of which are intersections of parabolas y=x2? 11 4 x? 7 4 and y=? 7 8 x2+x+ 31 8 ?