By the definition, An observed value of \bar{x} to estimate the mean of population is a point estimate and the statistic \bar{x} is a poiont estimator.
It is given that, "Hen 430 randomly selected light bulbs were tested in a laboratory"
That is, the Random sample size n= 430
The statement given that, "224 lasted more than 500 hours"
So x=224
Now find a point estimate of the last more than 500 hours proportion of all light bulbs:
Thus 
This implies that 
Thus the answer is D: 0.521.
When you divide fractions you need to multiply the first fraction by the reciprocal for the second
1/20 / 4/5
=1/20 * 5/4
=5/80
This can then be simplified to 1/16
Two equal sides and one unequal side.
Answer:
The inverse function is f(x) = (x - 1)/2
Step-by-step explanation:
To find the inverse of any function, start by switching the x and f(x) values.
f(x) = 2x + 1
x = 2f(x) + 1
Now solve for the new f(x). The result will be your inverse function.
x = 2f(x) + 1
x - 1 = 2f(x)
(x - 1)/2 = f(x)
Answer:
40
Step-by-step explanation:
40% = 16
1% = 16 ÷ 40 = 0.4
100% = 0.4 x 100 = 40
