Answer:
$12.50 per hour
Step-by-step explanation:
All you have to do is divide 100 by 8 to find the hourly rate. His rate is $12.50 per hour.
Answer:
D) 239
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.
Required sample size:
Is n
n is found when
We have that
So
Simplifying by 6
We round up, and the answer is 239.
Answer:
-5x³ + 10x² = -5x²(x - 2)
Step-by-step explanation:
Answer:
The narrowest confidence interval is obtained with a sample size of 2000 and a 95% confidence interval
Step-by-step explanation:
The confidence interval is the interval
where
= the mean of the sample
<em>s = the standard deviation of the sample
</em>
<em>n = the size of the sample
</em>
<em>z is the z-score corresponding to the level of confidence
</em>
In any case, the width of the interval is 2 times , so we only need to see which value of is the smallest between the different options.
<em>The values of z can be computed either with tables or a spreadsheet.
</em>
Sample size of 1000 and a 95% confidence interval
Sample size of 1000 and a 99% confidence interval
Sample size of 2000 and a 95% confidence interval
Sample size of 2000 and a 99% confidence interval
And we see that the narrowest confidence interval is obtained with a sample size of 2000 and a 95% confidence interval
The answer is A because you do 2/5 times 40/1 and that's 80/5 which simplifies to 16/1 which is 16.