Answer:
We need at least 601 incomes.
Step-by-step explanation:
We have that to find our 
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of 
.
So it is z with a pvalue of 
, so 
Now, find the margin of error M as such
In which 
is the standard deviation of the population and n is the size of the sample.
How many such incomes must be found if we want to be 95% confident that the sample mean is within $500 of the true population mean?
We have to find n, for which 
. So
Rounding up
We need at least 601 incomes.
Answer: x = 18
Step-by-step explanation:
Yes, 0.888 can be turned to a fraction, the fraction is = 888/1000 but simplified its 111/125. And its a repeating decimal.
Hey there!
It's c.
The initial amount is also the y intercept. If x equals 0, y = 6, which is the y-intercept or b in the slope-intercept form y = mx+b.
Hope this helps!
