X = y + 5
-y + x - x = y - y + x + 5
-y = x + 5
y = x - 5
Given:
n = 27, sample size
df = n-1 = 26, degrees of freedom
xb = 11.8, sample mean
s = 2.3, sample standard deviation.
Because population statistics are not known, we should use the Student's t-distribution.
At 99% confidence interval, the t-value = 2.779 (from tables).
The confidence interval is
11.8 +/- 2.779*(2.3/√(27)) = 11.8 +/- 1.23 = (10.57, 13.03)
Answer: (10.6, 13.0) to the nearest tenth
$14 - covert 2/5 to a decimal (or percentage) = 0.4 (40%) and then multiply by 35.
Coordinate of red point = (8, -5)
In short, Your Answer would be Option D
Hope this helps!
