Add 13 to both sides
13 = 2x + 15x
Simplify right side
13 = 17x
Divide through by 17
13/17 = x
Answer:
C. Decreases the margin of error and hence increases the precision
Step-by-step explanation:
If we select a sample by Simple Random Sampling in a population of “infinite” size (a population so large that we do not know its size exactly), then the margin of error is given by
where
<em>Z = The Z-score corresponding to the confidence level
</em>
<em>S = The estimated standard deviation of the population
</em>
<em>n = the size of the sample.
</em>
As we can see, since n is in the denominator of the fraction and the numerator is kept constant, the larger the sample size the smaller the margin of error, so the correct choice is:
C. Decreases the margin of error and hence increases the precision
Answer:
A,D,E
Step-by-step explanation:
i. 2t+3t=6t
5t=6t
ii. 2a+2b=4ab
iii. x+3=4x
To round it to the nearest unit it would be 38. To round it to the nearest ten it would be 40.
Answer:
11 feet
Step-by-step explanation:
3 yards equals 9 feet because there are 2 feet in one yard. 2*3=9
9+2= 11