Answer:
DONT KNOW SRY
Step-by-step explanation:
Answer:
The 99% confidence interval for the mean number of toys purchased each year is between 7.6 toys and 7.8 toys.
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 M as such
In which is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 7.7 - 0.1 = 7.6 toys
The upper end of the interval is the sample mean added to M. So it is 7.7 + 0.1 = 7.8 toys
The 99% confidence interval for the mean number of toys purchased each year is between 7.6 toys and 7.8 toys.
19 < 30
Is that what you're looking for?
Answer: They will need 18 vans and $1,764.00 to rent the vans out.
Step-by-step explanation:
<em>140/8= 17.5 ( rounded 18)</em>
So in order to fit all students, you'll need 18 vans
<em>98.00* 8= 1,764</em>
<em>So the amount of money you'll need is $1,764.00</em>