To estimate the mean score of those who took the medical college admission test on your campus, you will obtain the scores of an srs of students. from published information you know that the scores are approximately normal with standard deviation about 6.5 . you want your sample mean ¯ to estimate with an error of no more than 1.4 point in either direction. (a) what standard deviation must ¯ have so that 99.7% of all samples give an ¯ within 1.4 point of ? use the 68–95–99.7 rule. (enter your answer rounded to four decimal places.) standard deviation of ¯= (b) how large an srs do you need in order to reduce the standard deviation of ¯ to the value you found? (enter your answer rounded to the nearest whole number.) srs size =

answer:      

step-by-step explanation:

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160

step-by-step explanation:

idk

i hope i

step-by-step explanation:

i think something is missing in your question because y-1=(x-12) would not pass through the point (-4,-3). because if you replace x by -4 your are supposed to find y=-3 which is not the case her. if you replace x by -4 you find =-15.

i assume the right equation is y-1=1/4*(x-12) because this one is passing through both your points (if you are interested to know how i found that out i can tell you).

in this equation if i replace x by -4 i find y=-3 and if i replace x by 12, i find y=1 so the line representing this equation is passing through those 2 points.

then the standard form of the equation is finding an expression of y in function of x

y-1=1/4*(x-12)

y=x/4-3+1

y=x/4-2

hope that .

do you confirm there was a mistake in the question?