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irga5000 [103]
3 years ago
10

A screening test for a newly discovered disease was evaluated in order to determine how well the test performs. Investigators ad

ministered the test to a random sample of 900 people. Of the participants with the disease, 150 tested positive and 60 tested negative. Of those without the disease, 50 tested positive. What is the sensitivity of the screening test?
A. 7.14%
B. 71.43%
C. 7.50%
D. 75.00%
E. None of the above
Mathematics
1 answer:
saw5 [17]3 years ago
5 0

Answer:

B. 71.43%

Step-by-step explanation:

The sensitivity is the probability that a test will indicate 'disease' among those with the disease, that is, the test has a positive results:

In this problem, we have that:

150 people with the disease tested positive and 60 tested negative. So the sensitivity is:

S = 100*\frac{150}{210} = 71.43

The correct answer is:

B. 71.43%

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Answer:

D. 15x10^20

Step-by-step explanation:

The rule for scientific notation is that the coefficient has to be between 1 and less than 10. This means there is only one digit in front of the decimal. 15x10^20 should be written as 1.5x10^21 to follow the rule.

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Pepsi [2]

Since this is a right triangle, we can use the Pythagorean Theorem, which states a² + b² = c² in a right triangle.

Plugging our numbers in, we get:

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And finally, we can find the square root of both sides.

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Therefore, 37 is the answer and your answer choice is correct.

5 0
3 years ago
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In a group of 10 people, there are 4 people that have the flu virus. Suppose we pick 3 random persons to test in order to determ
Murljashka [212]

Answer:

Tests is 100% Accurate, so by using the formula of random variable probability.

Step-by-step explanation:

Total number of people = 10

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