The average American generates 4.4 lbs of trash every day. We circulated fliers that listed tips on how to reduce wastefulness in three separate neighborhoods. For the next week, we measured the amount of trash each person produced each day in those neighborhoods. There were 625 people total in our study. The mean trash per person was 4.3 lbs with a standard deviation of 1 Determine your sample's score on the comparison distribution.
a) -2
b) -1
c) -1.5
d) -2.5

And replacing we got:

And the best option would be:

d) -2.5

Step-by-step explanation:

For this problem we know that the true mean of  trash every day is:

And from the info given we also know that:

represent the sample mean

sample size selected

the population standard deviation assumed

If we want to find the z score for the person we can use the following formula:

And replacing we got:

And the best option would be:

d) -2.5

a ruler? idk

step-by-step explanation:

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d