In this question we simple wish to calculate the standard error and margin of error from the population. This can be done purely using the standard deviation and sample size.
Standard error
= std dev / (SQRT) n
= 11.5 / SQRT of 70
= 11.5 / 8.366
= 1.374
Margin of error is the standard error multiplied by a Z value that correspondence to a confidence percentage. At a 95% confidence the Z value is 1.96. Therefore
MOE = 1.96 x 1.374 = 2.69
This is known as: Symmetry
Answer:
i think the answer is x=1
Answer:
Step-by-step explanation:
The double angle formula states that:
In this question:
So
Then
Answer:
no solution.
Step-by-step explanation:
1. 7x + 3 = 7x - 4 Subtract 7x on both sides
2. 3 = -4
Three does not equal to negative four so, it has no solutions
