Answer:
Rational numbers
Step-by-step explanation:
Since 1.18 is a decimal number, it cannot belong to the set of integers or whole numbers.
However, also because it's a decimal number, it is rational because it can be written in the form p/q: .
Thus, 1.18 is only a rational number.
Hope this helps!
Answer:
A sample size of at least 87 will be needed.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find M as such
In which is the standard deviation of the population and n is the size of the sample.
In this problem, we have that:
So
A sample size of at least 87 will be needed.