et x be a random variable that represents white blood cell count per cubic milliliter of whole blood. Assume that x has a distribution that is approximately ormal, with mean u = 7100 and estimated standard deviation o = 2850. A test result of x < 3500 is an indication of leukopenia. This indicates bone marrow epression that may be the result of a viral infection. (a) What is the probability that, on a single test, x is less than 3500? (Round your answer to four decimal places.) .10383 (b) Suppose a doctor uses the average x for two tests taken about a week apart. What can we say about the probability distribution of x? O The probability distribution of x is approximately normal with u, = 7100 and o, = 1425.00. O The probability distribution of x is approximately normal with , = 7100 and o, = 2850. O The probability distribution of x is not normal. O The probability distribution of x is approximately normal with Hy = 7100 and o, = 2015.25. What is the probability of x < 3500? (Round your answer to four decimal places.) .003754

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Let x be a random variable that represents white blood cell count per cubic milliliter of whole blood. Assume that x has a distribution that is approximately
normal, with mean u = 7100 and estimated standard deviation o = 2850. A test result of x < 3500 is an indication of leukopenia. This indicates bone marrow
depression that may be the result of a viral infection.
(a) What is the probability that, on a single test, x is less than 3500? (Round your answer to four decimal places.)
.10383
(b) Suppose a doctor uses the average x for two tests taken about a week apart. What can we say about the probability distribution of x?
O The probability distribution of x is approximately normal with uy = 7100 and o, = 1425.00.
O The probability distribution of x is approximately normal with Hy = 7100 and o, = 2850.
O The probability distribution of x is not normal.
The probability distribution of x is approximately normal with u = 7100 and o, = 2015.25.
What is the probability of x < 3500? (Round your answer to four decimal places.)
.003754
Transcribed Image Text:Let x be a random variable that represents white blood cell count per cubic milliliter of whole blood. Assume that x has a distribution that is approximately normal, with mean u = 7100 and estimated standard deviation o = 2850. A test result of x < 3500 is an indication of leukopenia. This indicates bone marrow depression that may be the result of a viral infection. (a) What is the probability that, on a single test, x is less than 3500? (Round your answer to four decimal places.) .10383 (b) Suppose a doctor uses the average x for two tests taken about a week apart. What can we say about the probability distribution of x? O The probability distribution of x is approximately normal with uy = 7100 and o, = 1425.00. O The probability distribution of x is approximately normal with Hy = 7100 and o, = 2850. O The probability distribution of x is not normal. The probability distribution of x is approximately normal with u = 7100 and o, = 2015.25. What is the probability of x < 3500? (Round your answer to four decimal places.) .003754
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