<u>(a) Construct a 95% confidence interval for the difference between the average number of intrusion attempts per day before and after the change of firewall setting (assume equal variance)</u>
Answer:

Step-by-step explanation:
Take two points from the graph
(0,24) and (6,12)
Find the slope
The formula to calculate the slope between two points is equal to

substitute

---> is negative because is a decreasing function
Find the equation of the line in slope intercept form

we have

Note: The y-intercept is given (0,24)
substitute

Answer:
2
Step-by-step explanation:
The equation for this line is y=2x+1
The slope of the line is 2 because it moves 2 up on the y scale after it moves 1 on the x scale.
Answer:
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Step-by-step explanation: