Point estimate for the difference between two population proportions is the difference between the two sample proportions, written as:
and the standard deviation is given by
When np and n(1-p) is greater than 5, then the sampling distribution is approximately normal and we can use standard normal methods.
Thus, the propability of a test <span>for the difference between two population proportions is given by
</span>
It would be 7.45 since the -3.05 and the -9.5 together would equal -12.55 which subtracted from 20 would equal 7.45
Answer:
3.14mm
Step-by-step explanation:
C = 2 pi r
Using proportions, it is found that he has 14 more basketball tickets than baseball tickets.
<h3>What is a proportion?</h3>
A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct or inverse proportional, can be built to find the desired measures in the problem.
His proportion of baseball to basketball tickets is of 3:5. He has 21 baseball tickets, hence the amount of basketball tickets is found according to the following<em> rule of three</em>:
3/5 = 21/x
Applying cross multiplication:
3x = 105
x = 105/3
x = 35.
The difference is given by:
35 - 21 = 14.
He has 14 more basketball tickets than baseball tickets.
More can be learned about proportions at brainly.com/question/24372153
#SPJ1
If the diameter of the cone is 5, then the radius of it will be half that, or 2.5, thus
