Answer:
A)
Note that
Lower Bound = X - z(alpha/2) * s / sqrt(n)
Upper Bound = X + z(alpha/2) * s / sqrt(n)
where
alpha/2 = (1 - confidence level)/2 = 0.025
X = sample mean = 1723.4
z(alpha/2) = critical z for the confidence interval = 1.959963985
s = sample standard deviation = 89.55083319
n = sample size = 30
Thus,
Lower bound = 1691.355235
Upper bound = 1755.444765
Thus, the confidence interval is
( 1691.355235 , 1755.444765 ) [ANSWER]
*********************
b)
We assumed taht the distirbution of these observations is approximately normally distributed.
*******************
c)
Yes, because the values are not far away from each other.
Answer:
Well plz dont delete my question I need points to get mine out
Step-by-step explanation:
Answer:

Step-by-step explanation:


Answer:
ok it is there is no question lol
Step-by-step explanation:
Answer:
Step-by-step explanation:
The given line has a slope m = 4.
We know parallel lines have equal slopes.
<u>Use point - slope equation and substitute the coordinates of the given point to get:</u>
- y - 5 = 4(x - 4)
- y - 5 = 4x - 16
- y = 4x - 16 + 5
- y = 4x - 11