Answer:
Your friends data
Step-by-step explanation:
The rule of statistics is: the more exact the data, the better.
Here it seems that you got less precise data, as you can see. This also causes the possibility of mistakes.
This is because when you have data that is more exact, you get a better estimation for mean, median, etc. This can help make patterns in your data.
This means that your friend had better data than you.
Hope this helped!
Answer:
The sample size required is 228.
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 z-score that has a p-value of .
The margin of error is of:
90% confidence level
So , z is the value of Z that has a p-value of , so .
In previous years, the proportion has been 0.16.
This means that
Obtain a sample size that will ensure a margin of error of at most 0.04 for a 90% confidence interval.
This is n for which M = 0.04. So
Rounding up:
The sample size required is 228.
The first question is (7)
Answer:
1/8
Step-by-step explanation:
When there are two possiblities for each of 3 positions, the number of possible codes is 2^3 = 8. Your code is one of those, so its probability of occurrence is 1/8.
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CCC, CCP, CPC, CPP, PCC, PCP, PPC, PPP