Answer:
18
Step-by-step explanation:
33-15=18 I belive that is the mean
Answer:
length: 30 ft
width: 15 ft
Step-by-step explanation:
The sum of length and width is half the perimeter, 45 ft.
The ratio of length to width is 2 : 1, so the sum in "ratio units" is 2+1 = 3. That is, each "ratio unit" stands for 45 ft/3 = 15 ft of actual length.
Jason's pool is ...
length : width = 2·15 ft : 1·15 ft = 30 ft : 15 ft
Jason's pool is 30 ft long and 15 ft wide.
T F T
Step-by-step explanation: JUST DID THE TEST
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.