Answer:
3:00 pm
Step-by-step explanation:
5:30 pm
- 2 30
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3:00 pm
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:
Average waste per day per person =1.51 pounds
Step-by-step explanation:
In 2010 do United States has a population of 309 million people. Also in the year 2010, do United States recycled 170,000 million pounds of waste.
We have to find the the average waste per person per day.
In a year there are 365 days.
In a day, the average amount of waste produced =
= 
= 465.75 million pounds of waste
To find the average amount of waste produced per person per day, divide the average amount of waste produced per day by the total number of people in the country.
Average waste per day per person = 
= 1.51 pounds