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Answer:
x = - 4
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Here m = - and c = - 2, thus
y = - x - 2 ← equation of line
The x- intercept has a y- coordinate of zero.
Substitute y = 0 into the equation and solve for x
- x - 2 = 0
Multiply through by 2 to clear the fraction
- x - 4 = 0 ( add 4 to both sides )
- x = 4 ( multiply both sides by - 1 )
x = - 4
Thus the x- intercept is - 4
Answer:
The MOE for 80% confidence interval for <em>μ </em>is 5.59.
Step-by-step explanation:
The random variable <em>X</em> is defined as the number of square feet per house.
The random variable <em>X</em> is Normally distributed with mean <em>μ</em> and standard deviation <em>σ</em> = 137.
The margin of error for a (1 - <em>α</em>) % confidence interval for population mean is:
Given:
<em>n</em> = 19
<em>σ </em>= 137
Compute MOE for 80% confidence interval for <em>μ </em>as follows:
Thus, the MOE for 80% confidence interval for <em>μ </em>is 5.59.