To make a project, you need a rectangular piece of fabric
2 answers:
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Answer:
1. The interquartile range for the grade 7 data is 6.
2. The interquartile range for the grade 8 data is 6.
3. The difference of the medians of the two data sets is 2.
4. The difference is about 1/3 times the interquartile range of either data set.
Step-by-step explanation:
The hourly cookie sales by students in grades 7 and 8 at the school's annual bake sale is given by the following table.
Grade 7 Grade 8
20 21
15 29
30 14
24 19
18 24
21 25
The data set for grade 7 is
20, 15, 30, 24, 18, 21
Arrange the data in ascending order.
15, 18, 20, 21, 24, 30
Divide the data in four equal parts.
(15), 18, (20), (21), 24,( 30)
The interquartile range for the grade 7 data is
Therefore the interquartile range for the grade 7 data is 6.
The data set for grade 8 is
21, 29, 14, 19, 24, 25
Arrange the data in ascending order.
14, 19, 21, 24, 25, 29
Divide the data in four equal parts.
(14), 19, (21), (24), 25, (29)
The interquartile range for the grade 8 data is
Therefore the interquartile range for the grade 8 data is 6.
The difference of the medians of the two data sets is
Therefore the difference of the medians of the two data sets is 2.
Let the difference is about x times the interquartile range of either data set.
The IQR of each data is 6.
Therefore the difference is about 1/3 times the interquartile range of either data set.
Answer:
The given function is
Which is a parabola concave down with vertex at the origin of the coordinate system.
If the width of the arch is 800 feet, that means 400 feet on negative side and 400 feet and positive.
The image attached shows the graph of this parabola, where you can see the points for each extreme of the arch.
Notice that each point of the base of the arch is at y = -200, that means the height of the arc is 200 feet.
Now, the domain for this function is all real numbers. The range for this function is all number least or equal than zero.
