Answer:
y= = 0.75
Step-by-step explanation:
To subtract the second equation from the first equation, you have to divide the equation as left of the equal sign and right of equal sign then do the calculation separately. The calculation will look like this
-3x +2y = 7
-3x - 2y = 4
_____________ -
(-3x +2y) - (3x -2y) = 7 - 4
-3x + 2y + 3x + 2y = 3
4y= 3
y= = 0.75
Answer:
0.070 is the standard error of the mean weight in estimating a confidence interval estimate
Step-by-step explanation:
We are given the following in the question:
Sample mean, = 2.00 ounces
Sample size, n = 71
Alpha, α = 0.05
Population standard deviation, σ = 0.590 ounces
Formula for standard error =
Putting values, we get,
Thus, 0.070 is the standard error of the mean weight in estimating a confidence interval estimate