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Pie
3 years ago
8

A test for the presence of a certain disease has probability 0.2 of giving a false-positive result (indicating that an individua

l has the disease when this is not the case) and probability 0.1 of giving a false-negative result. Suppose that 10 individuals are tested, 5 of whom have the disease and 5 whom do not. Let X be the number of positive readings that result.
a. Explain why X does not have a binomial distribution.

b. Find the probability that exactly 3 of the 10 test results is positive?

Mathematics
1 answer:
drek231 [11]3 years ago
4 0
For the part b of the question please find the attached image.

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Answer:

The area would be the length of the rectangle times the with of the rectangle.

Step-by-step explanation:

Imagine the rectangle is cut up into tiny squares. For example, if the length of the rectangle is 5, and the with is 6, than each square would represent 1 unit that is in the area of the rectangle. So if you put 6 squares on the length of that rectangle, that side would be filled up, because the with is 6 and the length would be 4. Add 6 more squares on the with and you have 3 more square colluoms. Add 3 more times 6 than the rectangle would be filled with squares. What we just did is finding the area, which can be simplified to making 5 rows of 6 unit square colloums. This can be even more simplified by the equation length times with

4 0
3 years ago
Can someone pls describe how to do this.. and thank you
luda_lava [24]

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Step-by-step explanation:

Mathematics is the study of numbers, shapes and patterns. The word comes from the Greek word "μάθημα" (máthema), meaning "science, knowledge, or learning", and is sometimes shortened to maths (in England, Australia, Ireland, and New Zealand) or math (in the United States and Canada). ... Numbers: how things can be counted.

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7 0
3 years ago
Read 2 more answers
Please help with 4. And 5
Hoochie [10]
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6 0
3 years ago
Which equation can be solved by using this expression?
Marat540 [252]

<u>Answer:</u>

The correct answer option is B. 2 = 3x + 10x^2

<u>Step-by-step explanation:</u>

We are to determine whether which of the given equations in the answer options can be solved using the following expression:

x=\frac{-3 \pm\sqrt{(3)^2+4(10)(2)} }{2(10)}

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These requirements are fulfilled by the equation 4 which is:

12=3x+10x^2

Rearranging it to get:

10x^2+3x-2=0

Substituting these values of a,b,c in the quadratic formula:

x= \frac{-b \pm \sqrt{b^2-4ac} }{2a}

x= \frac{-3 \pm\sqrt{(3)^2-4(10)(-2)} }{y}

3 0
3 years ago
Type the correct answer in the box. x y 3 10 20 In the table, the relation (x, y) is not a function if the missing value of x is
yan [13]

The relation is <em>not a function</em> if any x-value is repeated.

Assuming you have

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3 years ago
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