Answer:
c. 139
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 the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
How large a sample should be taken to estimate the average age of out-of-state guests with a margin of error no larger than 5 and with a 95% level of confidence?
We need a sample size of n.
n is found when
So
Simplifying by 5
We round up,
So the correct answer is:
c. 139
Answer:
3
Step-by-step explanation:
53/2 = 26.5 = 27/9 = 3
99
Mark brainliest please
Hope this helps you
Answer: 14.4
Step-by-step explanation: 86.4 / 6 = 14.4
Answer:
A, B, D, E
Step-by-step explanation:
To find if something is equal to fifty percent, split the second number in half.
For example, lets use option D.
32/2=16
16 is the first number in the option, meaning it is 50%.
Lets use an example where it wouldn't work. In this case, option C.
12/2=6
6≠9
Meaning 9 is not 50% of 12.