49, 34, and 48 students are selected from the Sophomore, Junior, and Senior classes with 496, 348, and 481 students respectively. Identify which type of sampling is used and why?A) Convenience
B) Cluster
C) Random
D) Systematic
E) Stratified
Answers
Answer:
Stratified sampling
Step-by-step explanation:
In the question, students are selected from subgroups of Sophomore, Junior, and Senior classes.
We are told that 49, 34, and 48 students are selected from the Sophomore, Junior, and Senior classes with 496, 348, and 481 students respectively.
This means that the sample numbers of 49, 34 and 48 students were selected in proportion to the subgroup sizes of 496, 348, and 481 students respectively.
Thus, due to the fact that subgroups were selected & that sample number of students were also selected in proportion to their respective subgroup sizes, this is therefore a stratified sampling.
Final answer:
The type of sampling used in this scenario is stratified sampling. The type of sampling in this case is E) Stratified sampling.
Explanation:
The type of sampling used in this scenario is stratified sampling. Stratified sampling is a method where the population is divided into different groups or strata, and then a sample is randomly selected from each stratum. In this case, the sophomore, junior, and senior classes are the different strata, and the sample sizes are proportional to the size of each stratum.
To further explain, let's consider the sophomore class with 496 students. If we are selecting a sample size of 49 from this class, it means that approximately 10% of the students (49/496 = 0.098) will be selected. Similarly, for the junior class with 348 students, approximately 10% (34/348 = 0.098) of the students will be selected. The same applies to the senior class with 481 students and a sample size of 48 students.
In stratified sampling, the goal is to ensure that the sample represents the characteristics of each stratum in proportion to their size in the population. By sampling from each of the classes, we can obtain a representation of the entire student population.
Learn more about Stratified Sampling here:
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Answers
Answer:
11.725%
Step-by-step explanation:
Given that :
True value = 0.904 seconds
Measured time = 1.010 seconds
Experimental error :
(|measured value - True value | / true value) * 100%
(|1.010 - 0.904| ÷ 0.904) * 100%
= 0.106 / 0.904 * 100%
= 0.1172566 * 100%
= 11.725%
Answer:
11.725%
Step-by-step explanation:
B. The sum of x and 0.6 multiplied by 3 is equal to 7
C.The product of 3 times the sum of x and 0.6 is equal to 7
D.The sum of 3 and x multiplied by 0.6 is equal to 7
Answers
Answer:the right answer is a
Step-by-step explanation:
ive done this question
hope it helps
Answers
Answer:
The 98% confidence interval for the mean waste recycled per person per day for the population of Washington
(1.2878 ,1.9122)
Step-by-step explanation:
Step(i):-
Given random sample size 'n' = 13
The mean waste recycled per person per day
x⁻ = 1.6 pounds
The standard deviation of the sample 's' = 0.43 pounds
Degrees of freedom
ν = n-1 = 13 -1 =12
t₀.₀₁ = 2.618
step(ii):-
The 98% confidence interval for the mean waste recycled per person per day for the population of Washington
( 1.6 - 0.3122 , 1.6 +0.3122)
(1.2878 ,1.9122)
Final answer:-
The 98% confidence interval for the mean waste recycled per person per day for the population of Washington
(1.2878 ,1.9122)
Answers
Answer:
6
Step-by-step explanation:
63-15 =48 48/8 is 6
Answer:
x = 6
Step-by-step explanation:
8x + 15 = 63
8x = 63 - 15
8x = 48
x = 48/8
x = 6
Answers
Answers
Answer:
5.5+7.25−5.5−7.25 = 0
Step-by-step explanation:
To be honest, you shouldn't have to show work for an equation like this. But this is the answer. Hope it helped.
Answer:
5.5+7.25-5.5+(-7.25)
step 1: add 5.5 and 7.25
12.75−5.5−7.25
step 2: subtract 5.5 from 12.75
7.25−7.25
The answer is 0.
Step-by-step explanation:
Brainliest?