Answer:
(233.8436 ; 271.0564)
Yes
Step-by-step explanation:
Given :
Sample mean, xbar = 252.45
Sample standard deviation, s = 74.50
Sample size, n = 64
α = 0.05
The confidence interval :
Mean ± margin of error
Margin of Error = tα/2 * s/√n
df = n - 1 = 64 - 1 = 63
t(α/2, df = 63) = 1.998
Margin of Error = 1.998 * 74.50/√64
Margin of Error = 18.6064
The confidence interval :
252.45 ± 18.6064
(233.8436 ; 271.0564)
Comparing the confidence interval value and the mean value reported by the American Automobile Association ;it can be concluded that the mean reported by the American Automobile Association differ from the mean spent at Niagara Fall as 215.60 falls below the confidence interval.
Answer:
a and c have the same x value
Step-by-step explanation:
The line is going up, so that means there is a change in the y-values
If the line was horizontal, then there would be a change in the x-values.
Just picture it or draw it out, it would also help
Answer:
y=1/2x
Step-by-step explanation:
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form or
In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin
Verify each case
3 2/3=11/3
14 2/5=72/5
11/3x72/5=264/5
264/5=52 4/5
Answer:
-2x-4
Step-by-step explanation:
(-7x-7y-4)-(-5x-7y)=-7x-7y-4+5x+7y=-7x-4+5x=-2x-4
