Stratified sampling is the sampling method which is the most appropriate for determining the mean number of students per statistics class in your state.
<h3>What is Stratified sampling method?</h3>
This method involves dividing subjects into subgroups known as strata according to shared features.
To determine the mean number of students per statistics class in your state, the state should be divided into strata based on the area, then some statistics classes are then selected for further analysis so as to determine the number of students per statistics class in the state.
This is therefore the reason why Stratified sampling method was chosen as the appropriate choice.
Read more about Stratified sampling method here brainly.com/question/16587013
#SPJ4
Let the numbers be:
a, a+b, a+2b
mean of the numbers is:
(a+a+b+a+2b)/3=10
(3a+3b)/3=10
a+b=10
thus second term is 10
The sum of square will be:
((10 - b)² + 10² + (10 + b)²<span>) / 3 = 394
</span>(100 - 20b + b² + 100 + 100 + 20b + b²<span>) / 3 = 394
</span><span>(300 + 2b</span>²<span>) / 3 = 394
</span>(150+b²)=591
b²=441
b=-21,21
thus the numbers will be:
10-21, 10, 10+21
=-11,10,31
Answer:
a 345ml tin of paint is better value for money
Step-by-step explanation:
The probability that a student chose red is 55
Answer:
is this even real math ?
Step-by-step explanation: