for number one, the mean would be 45 minutes
for number 9, he wants to use the number of minutes that occurred most often as that is the definition of mode
please mark branliest it’d be appreciated ♡
I believe the answer is A because you cannot find x nor y
Answer:
1-i and -1+i
Step-by-step explanation:
We are to find the square roots of . First, convert from Cartesian to polar form:
Next, use the formula where to find the square roots:
<u>When k=1</u>
<u />
<u>When k=0</u>
<u />
Thus, the square roots of -2i are 1-i and -1+i
Answer:
a) 0.23
b) The 95% confidence interval for the population proportion is (0.1717, 0.2883).
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 .
Point estimate
The point estimate is:
95% confidence level
So , z is the value of Z that has a pvalue of , so .
The lower limit of this interval is:
The upper limit of this interval is:
The 95% confidence interval for the population proportion is (0.1717, 0.2883).
Answer:
0.9
Step-by-step explanation: