A doctor assigns people to treatment groups based on data from their medical records. Is this method of selecting treatment groups biased or unbiased?

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  biased

Step-by-step explanation:

Any time a selection criterion is used that is other than a random draw, the selection is biased.

For a medical study, the bias may be intentional. The study may have the purpose of determining treatment efficacy based on age, gender, or previous medical history.

i think asking google will you get the answer to that question

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is