The 90% confidence interval for the population mean is 78.1905<x<81.8095
The formula for calculating the confidence interval is expressed as:
CI = x ± z*s/√n
Given the following parameters
mean "x" = 80
z = 1.645
s = 5.5
n = 25
Substitute
CI = 80 ± 1.645*5.5/√25
CI = 80 ± 1.8095
CI = {78.1905, 81.8095}
Hence the 90% confidence interval for the population mean is 78.1905<x<81.8095
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Answer: -2
Explanation: On the image we can see it goes down 4 units and right 2. Giving us the slope
Simplified that is -2 which is the slope of the line
Answer:
Option B is correct.
Step-by-step explanation:
{ -1 , 0 , 1 , 7 }
Hope this helps!
y=790x-175