Answer:
Step-by-step explanation:
We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 18 - 1 = 17
90% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 17 degrees of freedom(y-axis) and a confidence level of . So we have T = 1.74
The margin of error is:
Confidence interval:
Sample mean plus/minus margin of error. So
Answer:
(a) The product of the sum of a and b and their difference.
(b) The tripled product of 6a and b².
(c) The difference of the squares of 2m and 7n.
Using the distributive property, you’ll get the equation 56i+63.
You’ll distribute (multiply) 7 to 8i, and 7 to 9
Answer:
4/16
Step-by-step explanation:
Answer:
keep trying you will get it my advice is go a different way around the prob then head in it, if you go around then you will never no and the thing you will now how to do is go around and round until you get stuck and there will be no one there to help you.