Answer:
Mean = 3640
Mode = 4100
Median = 3830.
Step-by-step explanation:
We are given the following data in the question:
Strength of casts (in psi):
3970,4100,3100,3200,2950,3830,4100,4050,3460
Formula:
Mode is the entry with most frequency. Thus, for the given sample mode = 4100.
Median
Since n = 9 is odd,
Formula:
Data in ascending order:
2950,3100,3200,3460,3830,3970,4050,4100,4100
Median = 5th term = 3830.
It is given that price of 3 muffins = $3.25
So price of 1 muffin=
And cost of 12 muffins
Therefore cost per dozen of muffins is $13 .
The question is incomplete, here is the complete question:
On May 3, 1999, 59 tornadoes hit a certain state in the largest tornado outbreak ever recorded for that state. Sixteen of these were classified as strong (F2 or F3) or violent (F4 or F5). Length of Path (miles) Intensity:
a. 7 F.
b. 9 F2.
c. 16 F3.
d. 11 F3.
e. 8 F2.
f. 9 F2.
g. 5 F2.
h. 16 F4.
i. 15 F3.
j. 38 F5.
k. 42 F4.
l. 3 F2.
m. 8 F2.
n. 1 F2.
o. 14 F3.
p. 23 F3.
Part (a) Make a box and whisker plot
Part (b) Identify outliners. Remove them and redraw the box and whisker diagram
Part (c) How does the removal of outliners effect box and whisker plot? How does is effect the median of the set?
Answer:
Given below with explanations
Step-by-step explanation:
(a)
The data is first arranged in ascending order:
1, 3, 5, 7, 8, 8, 9, 9, 11, 14, 15, 16, 16, 23, 38, 42
Total values = 16
Minimum value = 1
Maximum value = 42
Lower Quartile = 1/4 x 16 = 4th value = 7 (1, 3, 5, 7, 8, 8, 9, 9, 11, 14, 15, 16, 16, 23, 38, 42)
Upper Quartile = 3/4 x 16 = 12th value = 16 (1, 3, 5, 7, 8, 8, 9, 9, 11, 14, 15, 16, 16, 23, 38, 42)
Median = 1/2 x 16 = 8th value = 9 (1, 3, 5, 7, 8, 8, 9, 9, 11, 14, 15, 16, 16, 23, 38, 42)
The Box and whisker plot is attached in the picture below:
(b)
Outliners are 38 and 42
1, 3, 5, 7, 8, 8, 9, 9, 11, 14, 15, 16, 16, 23
Total values = 14
Minimum value = 1
Maximum value = 23
Lower Quartile = 1/4 x 14 = 3.5th value = 6 (1, 3, 5, 7, 8, 8, 9, 9, 11, 14, 15, 16, 16, 23)
(5+7)/2
Upper Quartile = 3/4 x 14 = 10.5th value = 14.5 (1, 3, 5, 7, 8, 8, 9, 9, 11, 14, 15, 16, 16, 23)
(14+15)/2
Median = 1/2 x 14 = 7th value = 9 (1, 3, 5, 7, 8, 8, 9, 9, 11, 14, 15, 16, 16, 23)
The Box and whisker plot is attached in the picture below:
(c)
The lower and upper quartile values have changed after removing the outliners but the median remains same in this case
