Editors preparing a report on the economy are trying to estimate the percentage of businesses that plan to hire
1 answer:
The number of randomly selected employers that would have to be contacted is 9604
<h3>How to solve for the value of n</h3>The confidence level is 95%
1 - 0.95 = 0.05
We have to get the z value at 0.05
0.05/2 = 0.025
Using the standard normal table, the critical value at 0.025 = 1.96
We have to define the probability as P = 50% = 0.5
we have to define q = 1 - 50% = 0.5
The formula that would be used to find the value of n is given as
These variables used are:
pq = variance of population
E = margin of error = 0.01
critical value = Zc = 1.96
= 0.25 * 38416
= 9604
Hence the sample space is given as 9604
Read more on confidence interval here:
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<em>What is the value of c in the quadratic </em>?
Before starting to solve, you should notice something - the
quadratic is not in its standard form!
We can easily fix it by adding on both sides:-
We can switch the order of 28 and -11x:-
Now, the quadratic is in its standard form, so we can get down to
finding the value of "c".
Remember, the standard form of a quadratic looks like so:-
Now we can just write our <u>quadratic</u> here:-
Now, can you see what the value of "c" is?
An easy way to <u>remember</u> "c" in quadratics is:-
The "c" in quadratics is the constant.
Henceforth, we conclude that the value of "c" in the given quadratic is:-