Answer:
21
Step-by-step explanation:
Using<em> Simple Random Sampling</em>, we can estimate the sample size by the formula
where
n = sample size
Z = the z-score corresponding to the confidence level 99.5%
S = the assumed standard deviation = 3 seconds
e = margin of error = 2 seconds
<em>It is worth noticing that the higher the confidence level, the larger the sample should be.
</em>
The z-score corresponding to a confidence level of 99.5% can be obtained either with a table or the computer and equals
Z = 3.023
Replacing the values in our formula
So the size of the sample should be at least 21.
Answer:
3x+12
Step-by-step explanation:
distribute
Answer:
1/24
Step-by-step explanation:
SHAWTYYY THIRSTY
Answer:
because base angle of isoscels triangle is congurent.
if one base is right angle then both base be rightangle.
The answer to this question that you have me would be 5|x|-7=7 will equal to x=2