Part
1  Answer for questions 1 to 4
“The
file "flowers.csv"
file contains information on measurements of the iris flowers.”
“Create an R data frame by the name "flower.data" that
contains the data in the file.”
“The
following R code shows an example of how to round a vector of numbers
to zero decimal places and then calculate some statistics using the
rounded numbers.”
“You
might need some of the calculations for this assignment, but you
might not need others.”
“You
would replace example$years with the name of the R object that you
want to analyze (in other programming languages, you might call
example$years a variable).”
“>
x < round(example$years, 0)”
“> freq < table(x)”
“> rel.freq < freq/sum(freq)”
“> cumsum(rel.freq)”
“> freq < table(x)”
“> rel.freq < freq/sum(freq)”
“> cumsum(rel.freq)”
“Cumulative
Frequency Table for Petal Length”
“Use
the following table to answer tasks 24.”
Value: 
1

2

3

4

5

6

7

Cumulative
Relative Frequency: 
.16

.33

.35

.58

.81

.97

1.00

Tasks
Flower
is blooming
_{}^{}
Question
1.
“Sometimes it is difficult to understand data if you do not know
what the numbers represent. Provide short definitions of two words:
sepal,
and petal
(be sure to cite your sources even if you paraphrase):”
Answer:
sepal:
“one of the individual leaves or parts of the calyx of a flower. “
(Dictionary.com, 2017).
petal:
“one of the often colored segments of the corolla of a flower.”
(Dictionary.com, 2017)
Reference
Dictionary.com,
(2017). Definitions and synonyms. Retrieved from
http://www.dictionary.com/
Question
2.
“There is a cumulative relative frequency table printed above for
petal lengths (using rounded values for petal length). Below
the number 3 in that table is the number .35. What does .35
represent? (multiple choice).”
“a.
Three of the flowers had petal length of 0.35.”
“b. There were 0.35 observations that had petal length of 3 (after rounding the petal lengths).”
“c. Of all the flowers measured in this sample 35% had a petal length of 3 (after rounding the petal lengths).”
“d. Of all the flowers measured in this sample 35% had a petal length of 3 or less (after rounding the petal lengths).”
“e. A study of all flowers on the planet would show that about 35% had petal lengths of 3 or less (after rounding the petal lengths).”
“b. There were 0.35 observations that had petal length of 3 (after rounding the petal lengths).”
“c. Of all the flowers measured in this sample 35% had a petal length of 3 (after rounding the petal lengths).”
“d. Of all the flowers measured in this sample 35% had a petal length of 3 or less (after rounding the petal lengths).”
“e. A study of all flowers on the planet would show that about 35% had petal lengths of 3 or less (after rounding the petal lengths).”
Answer:
Correct
is : (d). “Of all the flowers measured in this sample 35% had a
petal length of 3 or less (after rounding the petal lengths).”
A
wild flowers
Question
3.
“Using only the cumulative relative frequency table printed above
combined with some simple paperandpencil calculations, which petal
length occurs most frequently?”
Answer:
We
can find “most frequency” by calculating. The result shown that
Petal length of 4 and 5 occurs “most frequently” with relative
frequency is 0.23
Question
4.
“Describe how you determined your answer to the previous question
(describe the calculations that you used). Do not show R code for
this taskit will not be counted as an answer.”
Answer:
First,
find different between Cumulative Relative Frequency of each petal
length. Second, observe the results that are the relative frequency
of every petal length. I found that the highest value the relative
frequency of is 0.23 (Petal length of 4 and 5 occurs most
frequently).
1.00
 0.97 = 0.03
0.97
 0.81 = 0.16
0.81
 0.58 = 0.23…..> most frequency of petal length 4
0.58
 0.35 = 0.23…..> most frequency of petal length 5
0.35
 0.33 = 0.03
0.33
 0.16 = 0.16
Math is a bit complex for me. I will stick with enjoying the flowers. :)
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MATH 1280 Introduction to Statistics – Assignment 2
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Flower sepal and petal, illustration only, credit to Medium
Part 1  Answer for questions 1 to 4
“The file "flowers.csv" file contains information on measurements of the iris flowers.” “Create an R data frame by the name "flower.data" that contains the data in the file.”
“The following R code shows an example of how to round a vector of numbers to zero decimal places and then calculate some statistics using the rounded numbers.”
“You might need some of the calculations for this assignment, but you might not need others.”
“You would replace example$years with the name of the R object that you want to analyze (in other programming languages, you might call example$years a variable).”
“> x < round(example$years, 0)”
“> freq < table(x)”
“> rel.freq < freq/sum(freq)”
“> cumsum(rel.freq)”
“Cumulative Frequency Table for Petal Length"
MATH 1280 Introduction to Statistics – Assignment 2
Delete@
Question 2. “There is a cumulative relative frequency table printed above for petal lengths (using rounded values for petal length). Below the number 3 in that table is the number .35. What does .35 represent? (multiple choice).”
“a. Three of the flowers had petal length of 0.35.”
“b. There were 0.35 observations that had petal length of 3 (after rounding the petal lengths).”
“c. Of all the flowers measured in this sample 35% had a petal length of 3 (after rounding the petal lengths).”
“d. Of all the flowers measured in this sample 35% had a petal length of 3 or less (after rounding the petal lengths).”
“e. A study of all flowers on the planet would show that about 35% had petal lengths of 3 or less (after rounding the petal lengths).”
Answer:
Correct is : (d). “Of all the flowers measured in this sample 35% had a petal length of 3 or less (after rounding the petal lengths).”
MATH 1280 Introduction to Statistics – Assignment 2
Delete@
Question 4. “Describe how you determined your answer to the previous question (describe the calculations that you used). Do not show R code for this taskit will not be counted as an answer.”
Answer:
First, find different between Cumulative Relative Frequency of each petal length. Second, observe the results that are the relative frequency of every petal length. I found that the highest value the relative frequency of is 0.23 (Petal length of 4 and 5 occurs most frequently).
1.00  0.97 = 0.03
0.97  0.81 = 0.16
0.81  0.58 = 0.23…..> most frequency of petal length 4
0.58  0.35 = 0.23…..> most frequency of petal length 5
0.35  0.33 = 0.03
0.33  0.16 = 0.16
Interesting informations :)
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DeleteMATH, 1280 Introduction to Statistics – Assignment 2
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Tasks
Question 1. “Sometimes it is difficult to understand data if you do not know what the numbers represent. Provide short definitions of two words: sepal, and petal (be sure to cite your sources even if you paraphrase):”
Answer:
sepal: “one of the individual leaves or parts of the calyx of a flower. “ (Dictionary.com, 2017).
petal: “one of the often colored segments of the corolla of a flower.” (Dictionary.com, 2017)
Reference
Dictionary.com, (2017). Definitions and synonyms. Retrieved from http://www.dictionary.com/
MATH 1280 Introduction to Statistics – Assignment 2
Delete@
Question 3. “Using only the cumulative relative frequency table printed above combined with some simple paperandpencil calculations, which petal length occurs most frequently?”
Answer:
We can find “most frequency” by calculating. The result shown that Petal length of 4 and 5 occurs “most frequently” with relative frequency is 0.23