A system of linear equations usually has a single solution, but sometimes it can have no solution (parallel lines) or infinite solutions (same line). This article reviews all three cases. One solution. A system of linear equations has one solution when the graphs intersect at a point.

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3 years ago

4. The results of testing a new drug on 1,000 people with a certain disease found that 510 of them improved when they used the d

Shalnov [3]

Answer:

It would not be reasonable to say that more than half of the people with this disease would improve if they used the new drug

Step-by-step explanation:

Data provided in the question:

Sample size, n = 1000

Number of people improved when they used the drug = 510

Thus,

Probability that Number of people improved when they used the drug

= 510 ÷ 1000

= 0.510

Now,

margin of error, E = $2\times\sqrt{\frac{p(1-p)}{n}}$

= $2\times\sqrt{\frac{0.510(1-0.510)}{1000}}$

= 0.032 = 3.2%

Therefore,

Portion of 0.510 is likely to lie in the 3.2% of the actual value of population

And,

The lower portion can be as small as p - E

= 0.510 - 0.032

= 0.478 i.e 47.8% of the sample

Hence,

It would not be reasonable to say that more than half of the people with this disease would improve if they used the new drug

4 0

3 years ago