There is a relationship between confidence interval and standard deviation:

Where

is the mean,

is standard deviation, and n is number of data points.
Every confidence interval has associated z value. This can be found online.
We need to find the standard deviation first:

When we do all the calculations we find that:

Now we can find confidence intervals:

We can see that as confidence interval increases so does the error margin. Z values accociated with each confidence intreval also get bigger as confidence interval increases.
Here is the link to the spreadsheet with standard deviation calculation:
https://docs.google.com/spreadsheets/d/1pnsJIrM_lmQKAGRJvduiHzjg9mYvLgpsCqCoGYvR5Us/edit?usp=sharing
Answer:
38
Step-by-step explanation:
5x-7=3x+ll
5x=3x+18
2x/2=18/2
x =9
5 x 9 -7 = 36
3 x 9 + 11=36
m D =36
Answer:
N = 3
Step-by-step explanation:

I hope I helped you^_^
Answer:
<u>$15,000</u> is the amount to spend on marketing in the month of March.
Step-by-step explanation:
Given:
You have a monthly budget percentage of 5% for marketing.
Your projected sales for the month of March are $300,000.
Now, to find the amount spend on marketing:
Rate of marketing = 5%.
Projected sales for the month of March = $300,000.
Now, to get the amount spend on marketing in March:
<u><em>5% of $300,000.</em></u>



Therefore, $15,000 is the amount to spend on marketing in the month of March.
Answer:
Step-by-step explanation:
y-(-2) = 1/2(x-12)
y+2 = 1/2x - 6
y = 1/2x -8
y = mx +b