Plis correct answer 15 points
2 answers:
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Answer:
We need a sample size of at least 1698.
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.
You want the margin of error to be only one minute. What sample size do you need if the confidence level is 99%?
This is at least n when . So
Rouding up
We need a sample size of at least 1698.
Answer:
y=8x or y=8x + 0
Step-by-step explanation:
you need to take 2 points on the lina and make a triangle i used (-2,16) and (0,0).
The equation for gradient is
and the line touches the Y-axis at 0(that is your y-intercept)