Answer:
The margin of error is of 4.22 minutes.
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 = 10 - 1 = 9
95% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 9 degrees of freedom(y-axis) and a confidence level of . So we have T = 2.2622
The margin of error is:
In which s is the standard deviation of the sample and n is the size of the sample.
We have that . So
The margin of error is of 4.22 minutes.
Answer:
225
Step-by-step explanation:
200 by 50%=250 50-25=25 250-25=225
In inches: *1 millimeter = 0.0393701*
In feet: *1 millimeter = 0.00328084*
In yards: *1 millimeter = 0.00109361*
Answer: 672
Step-by-step explanation:
consecutive numbers are numbers that come one after another. If 99 is the largest you need to find the numbers before it.
93+94+95+96+97+98+99=672
Answer: -8
Step-by-step explanation:
12x+120=24
12x=-96
x=-8