Answer:
(7-4)/(6-2)= 3/4
Step-by-step explanation:
Answer:
i don't think so bud
Step-by-step explanation:
Answer:
Step-by-step explanation:
From the table we can see that
<u>The rate of change is (slope)</u>
<u>Zero point (y-intercept) considering same rate is </u>
<u>The rule for the total cost is:</u>
Correct option is C
X= # of sodas sold
x - 42 = # of hot dogs sold
x+x-42=202
2x = 244
x=122
122 sodas and 80 hot dogs
Answer:
b. It will decrease by a factor of 2
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence interval
, we have the following confidence interval of proportions.
![\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}](https://tex.z-dn.net/?f=%5Cpi%20%5Cpm%20z%5Csqrt%7B%5Cfrac%7B%5Cpi%281-%5Cpi%29%7D%7Bn%7D%7D)
In which
z is the zscore that has a pvalue of
.
The lower end of the interval is given by:
![\pi - z\sqrt{\frac{\pi(1-\pi)}{n}}](https://tex.z-dn.net/?f=%5Cpi%20-%20z%5Csqrt%7B%5Cfrac%7B%5Cpi%281-%5Cpi%29%7D%7Bn%7D%7D)
The upper end of the interval is given by:
![\pi + z\sqrt{\frac{\pi(1-\pi)}{n}}](https://tex.z-dn.net/?f=%5Cpi%20%2B%20z%5Csqrt%7B%5Cfrac%7B%5Cpi%281-%5Cpi%29%7D%7Bn%7D%7D)
The length of the interval is the subtraction of the upper end by the lower end, so it is:
![L = 2z\sqrt{\frac{\pi(1-\pi)}{n}}](https://tex.z-dn.net/?f=L%20%3D%202z%5Csqrt%7B%5Cfrac%7B%5Cpi%281-%5Cpi%29%7D%7Bn%7D%7D)
This means that the length is inverse proportional to the square root of the size of the sample.
So, if the sample size is multiplied by 4, the length of the interval is going to decrease by a factor of 2.