A survey was conducted in a class with 20 students about their favorite sport. Five students chose basketball, 8 students chose
1 answer:
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Answer: 0.332 < p < 0.490
Step-by-step explanation:
We know that the confidence interval for population proportion is given by :-
, where n= sample size
= sample proportion
z* = critical z-value.
As per given , we have
n= 258
Sample proportion of college students who own a car =
Critical z-value for 99% confidence interval is 2.576. (By z-table)
Therefore , the 99% confidence interval for the true proportion(p) of all college students who own a car will be :
Hence, a 99% confidence interval for the true proportion of all college students who own a car : 0.332 < p < 0.490
Answer:
The percent of the world's population lives in North America is <u>5%</u>.
Step-by-step explanation:
Given:
Of the 6.25 billion people in the world, 310 million live in North America.
Now, to find the percent of the world's population lives in North America.
Population of people in the world = 6.25 billion.
1 billion = 1000 million.
So, by using conversion factor we convert into million:
6.25 billion = 6250 million.
Population of people in North America = 310 million.
Now, to get the percent of the world's population lives in North America:
So, the percent to the nearest whole number is 5%.
Therefore, the percent of the world's population lives in North America is 5%.