Answer:
Step-by-step explanation:
-1/6-(-9/10)
=-1/6+9/10
Find the nonpermissible replacement for a in
1 answer:
Answer:
8
Step-by-step explanation:
Assuming the given expresion is:
Then we have a rational expression with domain a≠8
This means that we can replace 'a' with all real values except a=8.
We obtain this by setting the denominator equal zero and solve for 'a'.
The reason is that, the expression is not defined when the denominator is zero.
Therefore the non-permisible replacement is 8
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Answer:
A sample of 1068 is needed.
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 is:
95% confidence level
So , z is the value of Z that has a pvalue of
, so
.
At 95% confidence, how large a sample should be taken to obtain a margin of error of 0.03 for the estimation of a population proportion?
We need a sample of n.
n is found when M = 0.03.
We have no prior estimate of , so we use the worst case scenario, which is
Then
Rounding up
A sample of 1068 is needed.