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1 answer:
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Answer: 208
Step-by-step explanation:
Given : An advertising company wishes to estimate the population mean of the distribution of hours of television watched per household per day.
Standard deviation :
Margin of error :
Significance level :
Critical value :
The formula to calculate the sample size is given by :-
Hence, the minimum required sample size must be 208.
Answer:
y + 1 = - (x - 4)
Step-by-step explanation:
The equation of a line in point- slope form is
y - b = m(x - a)
where m is the slope and (a, b) a point on the line
Calculate m using the slope formula
m = (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = A(4, - 1) and (x₂, y₂ ) = B(-2, 3)
m = =
= -
Use either of the 2 points for (a, b)
Using (4, - 1), then
y - (- 1) = - (x - 4), that is
y + 1 = - (x - 4)