Answer:
$70,750
Step-by-step explanation:
The expected gain/loss is found by <em>adding the products of all of the profits/losses by their probability</em>. So,
<em>(0.8 * 100000) + (0.1 * 0) + (0.1 * -2500)</em> =
<em>80000 + 0 + -250</em> =
$70750
Answer:
A: 3
Step-by-step explanation:
Hopefully this helps!
Answer:
4
Step-by-step explanation:
For each number, you have to keep adding a positive 4 to get the next number in he sequence.
Answer:
A sample of 18 is required.
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 Z-table as such z has a p-value of
.
That is z with a pvalue of
, so Z = 1.88.
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.
A previous study indicated that the standard deviation was 2.2 days.
This means that 
How large a sample must be selected if the company wants to be 92% confident that the true mean differs from the sample mean by no more than 1 day?
This is n for which M = 1. So



Rounding up:
A sample of 18 is required.