Answer:
<h3>73220±566.72</h3>
Step-by-step explanation:
The formula for calculating the confidence interval is expressed as;
CI = xbar ± z*s/√n
xbar is the sample mean = $73,220
z is the z score at 99% CI = 2.576
s is the standard deviation = $4400
n is the sample size = 400
Substitute the given values into the formula;
CI = 73,220 ± 2.576*4400/√400
CI = 73,220 ± 2.576*4400/20
CI = 73,220± (2.576*220)
CI = 73220±566.72
Hence a 99% confidence interval for μ is 73220±566.72
Answer:
BH = 16
Step-by-step explanation:
The centroid theorem states that the centroid of a triangle is 2/3 of the distance from a vertex to the midpoint of the opposite side.
That means that BH is 2/3 of the length BF.
BH = (2/3)(BF)
BH = (2/3)(24)
BH = 16
Answer:
B
Step-by-step explanation:
Answer:
A is the answer
Step-by-step explanation:
In the table y is increased 70 for every 1 in x
(210/3 = 70)
on the graph for every 1 increase on x y increases by 55
(110/2 = 55)
so for the graph for x = 11, y =55 x 11 = 605
for the table for x = 11, y = 11*70 = 770
the difference is 770-605 = 165
the 2nd answer is the correct one.
