5.84 Blood diamonds. According to Global Research News (Mar. 4, 2014), one-fourth of all rough diamonds produced in the world are blood diamonds, i.e., diamonds mined to finance war or an insurgency. In a random sample of 700 rough diamonds purchased by a diamond buyer, let x be the number that are blood diamonds. a. Find the mean of x. b. Find the standard deviation of x. c. Find the z-score for the value x = 200. d. Find the approximate probability that the number of the 700 rough diamonds that are blood diamonds is less than or equal to 200.

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5.84 Blood diamonds. According to Global Research News
(Mar. 4, 2014), one-fourth of all rough diamonds produced
in the world are blood diamonds, i.e., diamonds mined to
finance war or an insurgency. In a random sample of 700
rough diamonds purchased by a diamond buyer, let x be the
number that are blood diamonds.
a. Find the mean of x.
b. Find the standard deviation of x.
c. Find the z-score for the value x = 200.
d. Find the approximate probability that the number of
the 700 rough diamonds that are blood diamonds is less
than or equal to 200.
Transcribed Image Text:5.84 Blood diamonds. According to Global Research News (Mar. 4, 2014), one-fourth of all rough diamonds produced in the world are blood diamonds, i.e., diamonds mined to finance war or an insurgency. In a random sample of 700 rough diamonds purchased by a diamond buyer, let x be the number that are blood diamonds. a. Find the mean of x. b. Find the standard deviation of x. c. Find the z-score for the value x = 200. d. Find the approximate probability that the number of the 700 rough diamonds that are blood diamonds is less than or equal to 200.
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