subject
Mathematics, 26.10.2020 20:50 clevelandjaniya

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 μ = 7950 and estimated standard deviation σ = 2800. 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.)

(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?
The probability distribution of x is approximately normal with μx = 7950 and σx = 2800.
The probability distribution of x is not normal.
The probability distribution of x is approximately normal with μx = 7950 and σx = 1400.00.
The probability distribution of x is approximately normal with μx = 7950 and σx = 1979.90.

What is the probability of x < 3500? (Round your answer to four decimal places.)

(c) Repeat part (b) for n = 3 tests taken a week apart. (Round your answer to four decimal places.)

(d) Compare your answers to parts (a), (b), and (c). How did the probabilities change as n increased?
The probabilities increased as n increased.
The probabilities stayed the same as n increased.
The probabilities decreased as n increased.

If a person had x < 3500 based on three tests, what conclusion would you draw as a doctor or a nurse?
It would be an extremely rare event for a person to have two or three tests below 3,500 purely by chance. The person probably does not have leukopenia.
It would be a common event for a person to have two or three tests below 3,500 purely by chance. The person probably does not have leukopenia.
It would be an extremely rare event for a person to have two or three tests below 3,500 purely by chance. The person probably has leukopenia.
It would be a common event for a person to have two or three tests below 3,500 purely by chance. The person probably has leukopenia.

ansver
Answers: 3

Other questions on the subject: Mathematics

image
Mathematics, 21.06.2019 18:30, Prolearner1234
For each polynomial, determine the degree and write the polynomial in descending order. a. –4x^2 – 12 + 11x^4 b. 2x^5 + 14 – 3x^4 + 7x + 3x^3
Answers: 2
image
Mathematics, 21.06.2019 21:00, india73
Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?
Answers: 2
image
Mathematics, 21.06.2019 21:10, samiam61
Which question is not a good survey question? a. don't you agree that the financial crisis is essentially over? 63on average, how many hours do you sleep per day? c. what is your opinion of educational funding this year? d. are you happy with the availability of electronic products in your state?
Answers: 2
image
Mathematics, 21.06.2019 22:30, brooklyn4932
1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x
Answers: 1
You know the right answer?
Let x be a random variable that represents white blood cell count per cubic milliliter of whole bloo...

Questions in other subjects:

Konu
Mathematics, 31.03.2021 20:00
Konu
Health, 31.03.2021 20:00
Konu
Mathematics, 31.03.2021 20:00
Konu
Chemistry, 31.03.2021 20:00