Question

Describe how to construct a stem-and-leaf plot from a set of data. Assume that the data consist of two-digit numerical values.

Choose the correct answer below.

A.

First, organize the data into several classes, such as 40-49, 50-59, and so on. Then, tally the number of data items in each class, and determine the percentage of the population occupied by each class. Draw a circle, and divide the circle into portions representing the percentage for each class.

B.

The plot is constructed by separating each data item into two parts. The first part is the stem. The stem consists of the tens digit. The second part is the leaf. The leaf consists of the units digit for a given value. Write all of the leaves in the first column. Then, write each stem in the second column, writing the stem of each data item in the row corresponding to its associated leaf.

C.

First, organize the data into several classes, such as 40-49, 50-59, and so on. Then, tally the number of data items in each class. In the first column, record the limits for each class. In the second column, record the number of data items in each class.

D.

The plot is constructed by separating each data item into two parts. The first part is the stem. The stem consists of the tens digit. The second part is the leaf. The leaf consists of the units digit for a given value. Write all of the stems in the first column. Then, write each leaf in the second column, writing the leaf of each data item in the row corresponding to its associated stem.

Answer #1

Correct option :
**D. The plot is constructed by separating each data item
into two parts. The first part is the stem. The stem consists of
the tens digit. The second part is the leaf. The leaf consists of
the units digit for a given value. Write all of the stems in the
first column. Then, write each leaf in the second column, writing
the leaf of each data item in the row corresponding to its
associated stem.**

Example of a stem and leaf plot :

Here is a data set summarized as a stem-and-leaf plot:
3
00024677779
4
0003445677888899
5
04456
6
669
How many data values are in this data set? n=n=
What is the minimum value in the last class?
What is the minimum value in the entire sample?
How many of the original values are greater than 40?
The test scores for two algebra classes are shown in the Stem
and Leaf below.
Test Scores
Period 9
Period 10
9 8 2...

Here is a data set summarized as a stem-and-leaf plot:
5# | 0022234569
6# | 01145555667779
7# | 01256
8# | 149
How many data values are in this data set? n=
What is the minimum value in the last class? ans =
What is the frequency of the modal class? (Hint, what is the
mode?) frequency =
How many of the original values are greater than 70? ans=

Here is a data set summarized as a stem-and-leaf plot:
3
00014558899
4
001222566677899
5
05679
6
789
How many data values are in this data set? n=n=
What is the minimum value in the last class?
What is the minimum value in the entire sample?
How many of the original values are greater than 40?

The stem and leaf plot shows a set of data regarding the number
of text messages sent and received per day by a group of college
students.Find the median and explain what it means in the context
of the problem. Write a detailed sentence.
0
2 6 7
1
2 2 6
2
2 4 4 5
3
1 9 9 9
4
0
5
6
1

Draw a stem-and-leaf plot for the data set. (Enter numbers from
smallest to largest separated by spaces. Enter NONE for stems with
no values.)
Data set A: The annual wages of employees at a
small accounting firm are given in thousands of dollars.
36
17
31
37
17
23
37
34
35
16
50
60
18

1. Driving under the influence of alcohol (DUI) is a serious
offense. The following data give the ages, in order,
of a random sample of 50 drivers arrested while driving under the
influence of alcohol. This distribution is based on the age
distribution of DUI arrests given in the Statistical Abstract of
the United States (112th Edition).
16 18 20 21 21 22 22 22 23 24 24 25 26 26 26 27 27 27 29 30 30
31 31...

The sample data below lists the number of minutes Internet
subscribers spent on the Internet during their most recent session
at the time of the survey.
50 40 41 17 11 7 22 44 28 21 19 23 37 51 54 42 86 41 78 56 72 56
17 7 69 30 80 56 29 33 46 31 39 20 18 29 34 59 73 77 36 39 30 62 54
67 39 31 53 44
A. Construct an expanded...

The following is a small data set of 25
observations. I want you to calculate some statistics by
hand to cement the class material. You can use the regular formula
for the variance or the computational formula - I’m just interested
in the correct result. If you use the computational formula, you
will want to calculate a separate row of each value squared in
order to calculate the Sum(x^2). Excel can be used to solve
this problem.
Var
28
4...

Class-In Assignment 3:
Chapters 4&5 How to retrieve data from two or more
tables Exercises
1. Write a SELECT statement that returns all columns from the
Vendors table inner-joined with all columns from the Invoices
table.
2. Write a SELECT statement that returns four columns:
vendor_name vendor_name from the Vendors table invoice_number
invoice_number from the Invoices table invoice_date invoice_date
from the Invoices table balance_due invoice_total minus
payment_total minus credit_total from the Invoices table The result
set should have one row...

An advantage of programming is the ability to perform millions
of calculations and dump it to a file for plotting. This can be
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a file, and plot the contents in excel.
a)
Create a csv file for writing. This can be done by creating a
file with the open method as we
have done in class but with a *.csv...

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