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
The number rounded is 385 mins.
I found this by mutilplying 0.13×384=around 50.
Please vote my answer brainliest. Thanks!
Answer:
<8 and <2 | <4 and <2 \ <3 and <5 |
Step-by-step explanation:
Interior alternate and vertical theorms
Answer:
The pythagorean theorem
Step-by-step explanation:
If the length and width of a rectangle are given, then you can use the pythagorean theorem to calculate the length of the diagonal which can otherwise be called the hypothenus since it forms a right triangle.
Answer:
1/2
Step-by-step explanation:
slope is rise over run. Choose two points on the line that are whole numbers. Then put the rise (1) over run (2)