I need help with this problem
2 answers:
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Answer:
A sample size of at least 1,353,733 is required.
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:
98% confidence level
So , z is the value of Z that has a pvalue of
, so
.
You would like to be 98% confident that you esimate is within 0.1% of the true population proportion. How large of a sample size is required?
We need a sample size of at least n.
n is found when M = 0.001.
Since we don't have an estimate for the proportion, we use the worst case scenario, that is
So
Rounding up
A sample size of at least 1,353,733 is required.
Answer:
Option C and D!
Step-by-step explanation:
- Option C because:-
When 9 is placed in the box after 7, we get:-
7 ÷ 9 = which is correct!
<u>7 ÷ 9 can also be written as </u><u>. So, this Option is right since the equation is correct when 9 is placed in the box!</u>
- Option D is also correct because,
When we place 9 in the box before , we get:-
9 ÷ = 81
9 ÷ equals 9 x 9 (take the reciprocal of
)
<u>9 x 9 equals 81 which means the equation is correct when 9 is placed in the box!</u>