A set of data has a normal distribution with a mean of 5.1 and a standard deviation of 0.9. Find the percent of data greater than 6.9. about 16 % about 34% about 13.5% about 2.5…

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asked Apr 11, 2017 99.8k views

2 Answers

Josh Bodah · Answer 1 · 2017-04-18T15:52:53+0000

P(x > 6.9) = 1 - P(x < 6.9) = 1 - P[z < (6.9 - 5.1)/0.9] = 1 - P(z < 2) = 1 - 0.97725 = 0.02275.

Therefore P(x > 6) is about 2.5%