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SVETLANKA909090 [29]
3 years ago
5

The prostate-specific antigen (PSA) test is a simple blood test to screen for prostate cancer. It has been used in men over 50 a

s a routine part of a physical exam, with levels above 4 ng/mL indicating possible prostate cancer. The test result is not always correct, sometimes indicating prostate cancer when it is not present and often missing prostate cancer that is present. Suppose that these are the approximate conditional probabilities of a positive (above 4 ng/ml) and negative test result given cancer is present or absent. In a large study of prostate cancer screening, it was found that about 6.2% of the population has prostate cancer. Draw a tree diagram for selecting a person from this population (outcomes: cancer present or absent) and testing his blood (outcomes: test positive or negative).

Mathematics
1 answer:
nadezda [96]3 years ago
8 0

The missing table for the Test Result can be expressed as:

                              Test Result

                               Positive         Negative

Cancer Present        0.21              0.79

Cancer Absent        0.06              0.94

Answer:

Step-by-step explanation:

A tree diagram is an elegant way of determining an exhaustive list of sample elements in the sample space. It is by finding the ordered n-tuples of the elements in the events under consideration.

The tree diagram for selecting a person from the population in the given question can be found in the attached image below.

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Mamont248 [21]

Answer:

The answer is 2.6. You get this by adding up all the numbers (0,1,2,3,7) and then dividing by the amount of numbers there are (5). The equation would be 0+1+2+3+7=13/5= 2.6

Hope this helps.

5 0
3 years ago
CAN SOMEONE HELP ME ASAP????<br><br> Find the gradient of the line 2y = -10x + 1
Mice21 [21]

Answer:

Gradient = -5

Step-by-step explanation:

The gradient of a line is the slope of the line.

The standard form of the line equation is y = mx  + b

where m is the slope ( or gradient) b is the y - intercept.

Given :

2y = -10x + 1

y = -\frac{10}{2} x  + \frac{1}{2}\\\\y = -5x  + \frac{1}{2}\\\\Therefore  , \ gradient  \ is \ -5

4 0
3 years ago
Read 2 more answers
What do I have?<br> what do I need ?<br>what should I use?
Ulleksa [173]
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4 0
3 years ago
I need help with slope (8th grade)
Triss [41]

Answer:

(y1-y2)/(x1-x2)

Step-by-step explanation:

if you have two points from the graph then you can use them to find the slope, for example:

(2,3) and (0,5)

you would take the first point and put it in a fraction (and the second point) but the x goes on the bottom and the y goes on the top:

3/2 and 5/0

Next you put them together minusing one of the equations, but make sure that the two coordinates line up (it doesn't matter which one, in the order):

3-5/2-0

Then you solve:

-2/2

-1

which means that -1 is the slope for this

(the "/" is a fraction bar, in case you didn't already know that)

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