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:
a) n=12/5. €==℅¥€®°×[°€™℅=×=π°√€^^=^¥€•π×{√|^
A gallon is 4 times larger than a quart because there are 4 quarts in 1 gallon!
Answer:
110°
Step-by-step explanation:
Angles on a quadrilateral always add up to 360°.
So, 100+95+55 = 250.
360-250 = 110°