The z-statistic for Brett's data is found to be as given by: Option A: -5.30 (approx).
<h3>How to find the value of z-statistic for population mean?</h3>
Suppose we're specified that:
- The sample mean =

- The population mean =

- The population standard deviation =

- The sample size = n
Then the z-statistic for this data is found as:

For this case, we've got:
- The sample mean =
= 295 - The population mean =
= 310 - The population standard deviation =
= 20 - The sample size = n = 50
Thus, we get:

Thus, the z-statistic for Brett's data is found to be as given by: Option A: -5.30 (approx).
Learn more about z-statistic here:
brainly.com/question/1640298
Answer:
− 3.5 ( x + y )
Hope this helps
Step-by-step explanation:
25 divided by 42 is 0.595
However, if you mean 25:42, as in a ratio(Which makes more sense), then the answer isn't much different.
25:42 is already in it's simplest ratio form, and brought down to a decimal, it is, again, 0.595
Since 1/2 is one half, the rise must be half of the run, meaning that the rise would be 25.
8-1/4n is the answer to this