The z-value that corresponds to a two-tailed 95% confidence interval is z = +/- 1.96. Then the bounds of the confidence interval can be determined as:
Lower bound = mean - z*SD/sqrt(n) = 20 - 1.96*2/sqrt(100) = 20 - 0.12 = 19.88 hours
Upper bound = mean + z*SD/sqrt(n) = 20 + 1.96*2/sqrt(100) = 20 + 0.12 = 20.12 hours
So the first choice is the correct answer: 19.88-20.12 hours
Answer:
the picture isnt popping up
The constant in an equation would be the number multiplied to x,
In the equation y - 6.7x, the constant would be 6.7
Answer:
Zahara need to add 4 quarts of water to keep the consistency the same
Step-by-step explanation:
Let
x -----> the amount of dry ingredients in quarts
y -----> the mount of water in quarts
we know that
Batch 1
Isolate variable y
----> equation A
Batch 2
For x=10
substitute in the equation A and solve for y
The ratio batch 2 is 
therefore
Zahara need to add 4 quarts of water to keep the consistency the same
Well a closed circle means greater than or less than or equal to. This means that if x which is the number we dont know, is higher than 5 than we can say that x is greater than or equal to 5. I cannot draw it on a computer so that is it.
