1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Harman [31]
3 years ago
8

In order for a vaccine to be effective, it should reduce a person's chance of acquiring a disease. Consider a hypothetical vacci

ne for malaria—a tropical disease that kills between 1.5 and 2.7 million people every year. Suppose the vaccine is tested with 300 volunteers in a village who are malaria free at the beginning of the trial. One hundred of the volunteers will get the experimental vaccine and the rest will not be vaccinated. Suppose that the chance of contracting malaria is for those who are not vaccinated. Construct a two-way table to show the results of the experiment if:
A) The vaccine has no effect.
B) The vaccine cuts the risk of contracting malaria in half.
Mathematics
1 answer:
Dmitrij [34]3 years ago
3 0

Answer:

Step-by-step explanation:

Let assume that Suppose the chance of contracting malaria is 10% for those who are not vaccinated ;   (since the value) is not given.

Thus;

If the vaccine has no effect, risk of malaria for vaccine and no vaccine are equal to 0.1

Probability of not getting malaria if vaccinated or no vaccinated = 1 - 0.1 = 0.9

                          Malaria                No Malaria               Total

Vaccinated     100 * 0.1 = 10        100 * 0.9 = 90                         100

No Vaccine     200 * 0.1 = 20   200 * 0.9 = 180        300-100 = 200

Total                 20 + 10 = 30       90 + 180 = 270                       300

If the vaccine cuts the risk by half, risk of malaria for vaccinated are equal to 0.1/2 = 0.05

Probability of not getting malaria if vaccinated = 1 - 0.05 = 0.95

                          Malaria                No Malaria               Total

Vaccinated     100 * 0.05 = 5         100 * 0.95 = 95                 100

No Vaccine     200 * 0.1 = 20   200 * 0.9 = 180        300-100 = 200

Total                 20 + 5 = 25       90 + 180 = 275                         300

You might be interested in
Can somebody please help me and tell me what the error is!! PLEASE I NEED HELP ELSE I WILL FAIL MY CLASS AND GO TO SUMMER SCHOOL
VikaD [51]

Answer:

I think that is enlargement

Step-by-step explanation:

i like helping out people oh by the way i'm new will you be my friend

3 0
2 years ago
I Need help please :>
Bezzdna [24]
1. What is the total mass of the items in the wheel barrow?
9300g


2. What’s the mass of items, in kg, left in the barrow?
4.9kg
5 0
3 years ago
Find the domain and range of the given relation (6,3), (-7,-3), (-4,1), (1,-4)
lions [1.4K]

Answer:

Step-by-step explanation:

The domain are all the x values

(-7,-3), (-4,1), (1,-4), (6,3)

x here is from -7 to 6

domain ∈ [-7, 6]

The range are all the y values

(1,-4), (-7,-3), (-4,1), (6,3)

y here is from -4 to 3

range ∈ [-4, 3]

3 0
2 years ago
6. Anna can walk 10 miles in 4 hours. At this rate, how many minutes does it take her to walk one mile?
Slav-nsk [51]

Answer:

150 minutes

Step-by-step explanation:

10/4 divided by 4/4 is 2.5/4

2.5 hours = 150 minutes

8 0
3 years ago
Read 2 more answers
What is the slope of the line?
spin [16.1K]

Answer:

-7/2

Step-by-step explanation:

The slope of a line can be defined as: \frac{rise}{run}, which can be more formally calculated as: \frac{y_2-y_1}{x_2-x_1}, where it's essentially the same thing, except the rise/run is being calculated with two points (which you already need)

So let's just say: (x_1, y_1)=(-5, 5)\text{ and } (x_2, y_2)=(-3, -2)

Plugging the values into the equation we get: \frac{-2-5}{-3-(-5)}\implies\frac{-7}{-3+5}\implies-\frac{7}{2}

You can also just look at the graph and see that from point 1 to point 2, it "rised" -7 units, and "ran" 2 units.

Notice how the "rise" is negative? That just means it went down.

4 0
1 year ago
Other questions:
  • At what altitude did the balloon remain the longest? how long was that ?
    15·1 answer
  • What’s the measure of angle X ?
    6·2 answers
  • How to simplify (4•4-3•1-3•3)\[0-(-2)•(-2)
    13·2 answers
  • 2. An article in the Journal of the American Medical Association reports the results of a
    10·1 answer
  • (can i have a little help?) Find the ratio that is equivalent to 3:8. A. 8:11 B. 5:8 C. 6:16 D. 8:10
    10·2 answers
  • Pentagons STUVW and XYZAB are similar with XY = 32 , YZ = 36 , ST = 4c + 2 and TU = 5c + 2 What is the length of TU
    11·1 answer
  • Evaluate 47-5 times 3
    7·1 answer
  • Until the scale was changed in 1995, SAT scores were based on a scale set many years ago. For Math scores, the mean under the ol
    5·1 answer
  • Cho m là tham số. Tìm điều kiện của m để phương trình x^2+2(m+1)+m+3=0 có nghiệm kép
    10·1 answer
  • What is the answer to these questions?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!