<span>-49 + -2x + 12x = 101 + -12x + 12x Combine like terms: -2x + 12x = 10x -49 + 10x ... 101 + 49 = 150 10x = 150 Divide each side by '10'. x = 15 Simplifying x = 15 </span><span>
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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.
Answer:
Q = ( -3 , 6 ) .... R = ( -1 , 8 ) ...... S = ( -5 , 7 )
Step-by-step explanation:
Q = ( 1 + ( -4 ) , 4 + 2 ) = ( -3 , 6 )
R = ( 3 + ( -4 ) , 6 + 2 ) = ( -1 , 8 )
S = ( -1 + ( -4 ) , 5 + 2 ) = ( -5 , 7 )
Answer: 42.5
Step-by-step explanation:
