Answer:
We need at least 4238 scores.
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
In which 
is the standard deviation of the population and n is the size of the sample.
How many random IQ scores must be obtained if we want to find the true population mean (with an allowable error of 0.5) and we want 97 percent confidence in the results
We need at least n scores, in which N is found when 
. So
We need at least 4238 scores.
The squares area can be calculated by multiplying width and length. Since these values are the same for the square, we can use exponents.
(6)^2 - (3)^2 - (2)^2 = area
The area is 23 square inches.
Mode, because out of the 3 numbers, it is the least. BTW- the only reason I know this is because I had this question not too long ago
1/2^9 given that the first question is already known as correct
Hi!
We will solve this by simply multiplying both sides of the equation with 5, like this:
Hope this helps!
