Answer:
We need a sample size of 2,071,800 or higher.
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, we 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.
In this problem:
We need a sample size of n or higher, when . So
We need a sample size of 2,071,800 or higher.
Answer:
C
Step-by-step explanation:
First of all,
- if the line goes Upward (from left to right), it is sloping upward and the correlation coefficient would be POSITIVE.
- If the line goes Downward (from left to right), it is sloping downward and the correlation coefficient would be NEGATIVE.
Since, from the graph we can see that the line is sloping upward, we know the correlation coefficient would be POSITIVE, so we can immediately eliminate choices A & B.
Now, the closer the correlation coefficient value is to 0, the less steep the line is. The closer it is to 1, the more steeper it is.
Looking at the graph, it isn't that flat, it is quite steep. So the correlation coefficient would be 0.8, NOT 0.1
So, answer choice C is right.
<em><u>Solution:</u></em>
Given that,
<em><u>Use the following log rules</u></em>
Rule 1:
Rule 2:
Rule 3:
Break 162 down to primes:
Thus we get,
Next
Break 324 down to primes:
Next
By rule 2
Next
By rule 2
Thus the given are evaluated in terms of x and y
Answer: 21 is your range
hope this helps
Step-by-step explanation:
To find the range, subtract the smallest number in the set from the largest
the answer would be 3.7+(-1.5)