Answer:
3
Step-by-step explanation:
Since y is directly related to x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = 81 when x = 27
k =
=
= 3
Answer:
D: 5 1/2
Step-by-step explanation:
1 1/2 + 4 = 5 1/2
Answer: 1/4x+2
Step-by-step explanation: I work it backwards by plugging the x and y values into the possible answers till it works.
Answer:
The correct answer is:
(a) 0.54
(b) 0.0385
Step-by-step explanation:
Given:
Restaurant tax,
p = 0.54
Sample size,
n = 168
Now,
(a)
The mean will be:
⇒ μ ![\hat{p}= p](https://tex.z-dn.net/?f=%5Chat%7Bp%7D%3D%20p)
![=0.54](https://tex.z-dn.net/?f=%3D0.54)
(b)
The standard error will be:
= ![\sqrt{[\frac{p(1-p)}{n} ]}](https://tex.z-dn.net/?f=%5Csqrt%7B%5B%5Cfrac%7Bp%281-p%29%7D%7Bn%7D%20%5D%7D)
= ![\sqrt{[\frac{(0.54\times 0.46)}{168} ]}](https://tex.z-dn.net/?f=%5Csqrt%7B%5B%5Cfrac%7B%280.54%5Ctimes%200.46%29%7D%7B168%7D%20%5D%7D)
= ![\sqrt{[\frac{(0.2484)}{168} ]}](https://tex.z-dn.net/?f=%5Csqrt%7B%5B%5Cfrac%7B%280.2484%29%7D%7B168%7D%20%5D%7D)
= ![0.0385](https://tex.z-dn.net/?f=0.0385)