13. In a random sample of 200 school district residents, 94 stated they are in favor of starting the school day 15 minutes later each day.
(a) Show that the conditions for calculating a confidence interval for a proportion are satisfied.
(b) What is the margin of error for a 90% confidence interval?

step-by-step explanation:

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a

step-by-step explanation:

step-by-step explanation:

answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where,

here given table is,

price ($), x   :           18         23       25       29       30       33

pairs sold, y :         16         13         10       8         6       2

so, ,   ,   ,

and   ,

thus, slop of the given line is,

⇒  

⇒   ≈ 33