Answer:
Step-by-step explanation:
Here we are given that a polynomial has zeros as 2 , i and -i . We need to find out the cubic polynomial . In general we know that if are the zeros of the cubic polynomial , then ,
Here in place of the Greek letters , substitute 2,i and -i , we get ,
Now multiply (x-i) and (x+i ) using the identity (a+b)(a-b)=a² - b² , we have ,
Simplify using i = √-1 ,
Multiply by distribution ,
Simplify by opening the brackets ,
Rearrange ,
Answer:
The approximate value of the standard error of the sampling distribution is 3.63.
Step-by-step explanation:
We are given that a sample of 90 people is taken from a population. The standard deviation of the sample is 34.4.
Firstly, Standard error basically tells us that how much sample mean is deviated from the actual or true mean of the population.
It is most useful in constructing a confidence interval about population parameters.
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<u>Now, as we know that the formula for finding standard error is given by;</u>
Standard error =
where, s = standard deviation = 34.4
n = sample size of people = 90
So, Standard error of the sampling distribution =
= <u>3.63</u>.
C=pi*d
Where pi is 3.14 and d is the diameter, in this case is 14ft. Find the circumference