That's a pretty confusing one. I think it's 10 minutes.
Answer:
A. A stratified random sample is a combination of simple random samples selected from each of several strata.
Step-by-step explanation:
In Statistics, sampling can be defined as a process used to collect or select data (objects, observations, or individuals) from a larger statistical population using specific procedures.
There are various types of sampling used by researchers and these are;
1. Random sampling.
2. Convenience sampling.
3. Systematic sampling.
4. Cluster sampling.
5. Stratified sampling.
Stratified random sampling can be defined as a method of sampling that involves dividing a population into smaller groups known as strata.
In stratified random sampling, the strata are formed based on member's shared characteristics (e.g female or male, occupation, education) or attribute (e.g black or white).
<em>Hence, the statement about stratified random sampling which is true is that, a stratified random sample is a combination of simple random samples selected from each of several strata. </em>
Answer:
1 chance in 67 945 521 that's about 1 chance in 57 million
Step-by-step explanation:
Very very small.
The way to choose 6 numbers out of 63 in any order is
63C6
which means
63!/ [ (63 - 6)! 6! ]
63 * 62 * 61 * 60 * 59 * 58/6! = 67945521
So he has 1 chance in 67945521
Put another way, 1 person in 5 in the United States would have to buy a ticket for one of them to win the lottery.
Answer:
x + y ≥ 20
3x + 5y > 60
Step-by-step explanation:
Let
Bags of candy corn = x
Bags of chocolate = y
Cost of bags of candy corn = $3
Cost of bags of chocolate = $5
He needs to buy at least 20 bags of candy and he cannot spend more than $60
system of linear inequalities to model the situation.
x + y ≥ 20
3x + 5y > 60
The system ot inequalities which models the situation
x + y ≥ 20
3x + 5y > 60
Jacksonville Fl and Tallahassee FL will be about 125 miles apart in real life.