<span>x−<span>2/7</span></span>=<span>5/<span>7
so this means x = 1</span></span>
Answer: 3
Step-by-step explanation:
Given : Standard deviation : 
Margin of error : 
Significance level : 
By using the standard normal table of z ,
Critical value : 
The formula we use to find the minimum sample size required :-

i.e. 
Hence, the number of lights should we select if we wish to estimate μ to within 5 seats and be 95 percent confident =3
<span> (8^ -2)(4^4)(16^ -1)
</span>
<span>a^-x=(1/a^x)
</span>
<span> (4^4)/((8^2)(16))
"NOTE" </span><span>16^1=16
</span>
<span>4^4=256
8^2=64
256/((64)(16))=1/4
</span>
<span>convert 1/4 to a power of two
</span>
<span>(4) is 2
1/4=1/(2^2)
</span>
<span>1^2=1
(1/2)^2=(1/4)
</span>
<span>1/2 to the power of 2 is the answer
It would look like this
1/2²</span>