Answer:
The minimum sample size needed is 
. If n is a decimal number, it is rounded up to the next integer. 
is the standard deviation of the population.
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 Z-table as such z has a p-value of 
.
That is z with a pvalue of 
, so Z = 1.645.
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 must she select if she desires to be 90% confident that her estimate is within 4 ounces of the true mean?
A sample of n is needed, and n is found when M = 4. So
The minimum sample size needed is . If n is a decimal number, it is rounded up to the next integer. is the standard deviation of the population.
Hello,
The answer is "x=91".
Reason:
First write the equation:
3^4+2*5=
Now use PEMDAS:
E goes first:
3^4=3*3*3*3=81
81+2*5
M goes next:
2*5=10
81+10=
Now use A:
81+10=91
x=91
If you need anymore help feel free to ask me!
Hope this helps!
~Nonportrit
Answer:
each gift =$10
total=y
number of gifts =x
therefore,total= each gift * number of gifts
=$10* x
Answer:
59
Step-by-step explanation:
3x=177
3x represents the # of arrow he can shoot at once every time
177 represents the total # of arrow he has
