Is 6^-2 positive or negative. explain
1 answer:
is a positive value.
This is because when you put a number to the power of a negative, the negative forms the reciprocal of the number, so would be 1/2, as 2/1 × 1/2 = 1, which is what a reciprocal does.
When the negative is more than 1, you simply put the number to that power, and then form the reciprocal of that, which makes equal to 1/36, which is positive.
I hope this helps! Let me know if you have any questions :)
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Answer: 16590
Step-by-step explanation:
The formula we use to find the sample size is given by :-
, where p = prior estimate of population proportion.
= Critical z-value (Two- tailed)
E= Margin of error .
Let p be the population proportion of cyanobacteria.
Given : E = 0.01
Critical value for 99% confidence interval :
If Ian does not want to rely on previous knowledge , then we assume p=0.5 because the largest standard error is at p=0.5.
Now, the required sample size =
Required sample size = 16590