Triangles have 3 vertices. The total is 21 vertices. 21 / 3 = 7. He drew 7 triangles.
Answer:
The sample size needed is 2401.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.

In which
z is the zscore that has a pvalue of
.
The margin of error of the interval is:

95% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
Estimate the sample size needed if no estimate of p is available so that the confidence interval will have a margin of error of 0.02.
We have to find n, for which M = 0.02.
There is no estimate of p available, so we use 






The sample size needed is 2401.
Answer:

Step-by-step explanation:
First, we can factor all of the following equations to turn that weird, huge looking thing into
÷
×
. We know that division is simply multiplication by the reciprocal, so that whole equation will turn into
×
×
. Now we can cancel out some values if they are both in the numerator and denominator, which will turn that still huge looking thing into
which is our final answer, as it cannot be simplified further.
Hope this helped! :)
You order them least to greatest, then take out your mean, median, and mode. Then you've got your outliners left over.