BUSI820_AssignmentA1
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Statistics
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Table of Contents
A1. 2.1. What Steps or Actions Should Be Taken After You Collect Data and Before You Run the Analyses Aimed at Answering Your Research Questions or Testing Your Research Hypotheses?
.....................................................................................................................................
4
A1. 2.2. Why Should You Label the Values of Nominal Variables?
..............................................
4
A1. 2.3. Why Would You Print a Codebook or Dictionary
............................................................
5
A1. 2.4. What Do You Do If You Look at Your Data File and See Words or Letters Instead of Numbers? Why Is This Important to Do?
........................................................................................
5
A1. 2.5. Why Would You Use the Mean Function to Create a Variable, As We Did For The Pleasure Scale?
................................................................................................................................
5
A1. 2.6. (a) Why is It Important to Check Your Raw (Questionnaire) Data Before and After Entering Them into The Data Editor? (b) What Are Ways to Check the Data Before Entering Them? After Entering Them?
..........................................................................................................
6
A1. 2.6. (a) Why is It Important to Check Your Raw (Questionnaire) Data Before and After Entering Them into The Data Editor?
................................................................................
6
A1. 2.6. (b) What Are Ways to Check the Data Before Entering Them? After Entering Them?
..........................................................................................................................................
6
SPSS Problems Chapter 2
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7
Compute the N, minimum, maximum, and mean for all the variables in the College StudentData.sav file. How many students have complete data? Identify any statistics on the output that are not meaningful. Explain
......................................................................................
7
1
BUSI 820 - A1 QUANTITATIVE ANALYSIS What is the mean height of the students? What about the average height of the same-sex parent? What percentage of students are males? What percentage have children?
.....................
8
References
......................................................................................................................................
11
2
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BUSI 820 - A1 QUANTITATIVE ANALYSIS A1. 2.1. What Steps or Actions Should Be Taken After You Collect Data and Before You
Run the Analyses Aimed at Answering Your Research Questions or Testing Your Research
Hypotheses?
Before conducting analyses to address your research questions or test hypotheses, there are several essential steps to follow data collection. First, determine the appropriate coding for each variable, establishing the values or numbers corresponding to different responses. Next, meticulously review the collected data, such as questionnaires, to ensure that participant responses align consistently and accurately with your established coding rules. Make necessary corrections in your coding documentation. Subsequently, define and assign labels to variables using SPSS. Proceed to enter the data; this can be done directly from the original questionnaires or via a coding sheet. It's crucial to cross-reference the entered data with the original source to identify any discrepancies. Lastly, ensure data accuracy by running basic descriptive statistics, detecting potential errors. A1. 2.2. Why Should You Label the Values of Nominal Variables?
The act of labeling nominal variables properly provides a clear framework for data analysis. It ensures consistency in the application of statistical methods, aids in the selection of suitable techniques based on the nature of the data and facilitates accurate interpretation of the results. Labeling the values of nominal variables is crucial for several reasons.
First, when a variable has only two levels, such as "Yes" or "No," or "Pass" or "Fail," researchers typically label it as nominal in software like SPSS Statistics Variable View. This practice aligns with tradition and allows for the consistent use of statistical methods suitable for 3
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BUSI 820 - A1 QUANTITATIVE ANALYSIS nominal variables. Second, for variables with three or more categories, a critical decision point arises. It's important to determine whether these categories exhibit an inherent order, i.e., if they range from low to high in a meaningful way. If the categories are merely distinct labels without any specific order, labeling the variable as nominal is appropriate (Morgan et al., 2020).
A1. 2.3. Why Would You Print a Codebook or Dictionary?
Printing a codebook or dictionary is essential as it serves as a comprehensive reference for understanding and managing data. It provides a clear description of variable meanings, aiding
in error identification by allowing cross-referencing of data entries. The codebook clarifies variable categories, highlights special codes for missing values, and indicates the measurement level of each variable (Morgan et al., 2020). By creating a tangible resource, researchers ensure efficient data management, validation, and analysis, ultimately facilitating accurate interpretation
and utilization of the dataset's information.
A1. 2.4. What Do You Do If You Look at Your Data File and See Words or Letters Instead
of Numbers? Why Is This Important to Do?
If words or letters are used instead of numbers, recording is necessary. There are several reasons to recode a variable. It's feasible that errors existed in the initial data coding that require correction. Researchers can conduct a frequency distribution analysis or employ descriptive statistics on a variable to identify any issues that need to be resolved through recoding.
A1. 2.5. Why Would You Use the Mean Function to Create a Variable, As We Did For The
Pleasure Scale?
This approach proves advantageous when participants have responded to the majority of items within a construct or scale encompassing multiple questions. Utilizing SPSS's Mean function enables the calculation of an average score for this variable across all participants, 4
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BUSI 820 - A1 QUANTITATIVE ANALYSIS accommodating those with missing data by utilizing their available item responses for computation (Morgan et al., 2020). However, caution is advised when applying the Mean function for scales with multiple items. This caution becomes crucial if some participants have only answered a limited number of
items. For instance, if a construct like math anxiety involves responses to seven items, but certain
respondents have only addressed two or three of them, utilizing the Mean function could introduce bias to the results (Morgan et al., 2020).
A1. 2.6. (a) Why is It Important to Check Your Raw (Questionnaire) Data Before and After
Entering Them into The Data Editor? (b) What Are Ways to Check the Data Before
Entering Them? After Entering Them?
A1. 2.6. (a) Why is It Important to Check Your Raw (Questionnaire) Data Before and After
Entering Them into The Data Editor?
When inputting information into the data editor, it's of utmost importance to meticulously
verify the questionnaire responses both prior to and following entry. This caution is due to the potential for errors during data input, and this verification process offers a chance to rectify any inaccuracies prior to incorporation into the data editor. Furthermore, this verification process presents an opportunity to address inadvertent omissions or incorrect entries, enhancing the completeness and accuracy of the dataset.
A1. 2.6. (b) What Are Ways to Check the Data Before Entering Them? After Entering Them?
The process of checking data ensures the availability of concise and unambiguous information for entry, subsequently contributing to a more precise dataset. Within the Data Editor, data can be viewed in a spreadsheet-like format, offering diverse functions like the 5
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BUSI 820 - A1 QUANTITATIVE ANALYSIS addition of new data and the modification of existing information, encompassing variable names,
labels, and display formats, along with value labels.
An additional approach to guarantee data accuracy prior to its integration into the data editor involves meticulous scrutiny of the dataset. By reevaluating labels and variables through the program, you can confirm their accuracy before final entry. Once the data is entered, it's imperative to conduct a visual double-check to ensure its precise input. This can be achieved by referencing the codebook or data editor, which facilitates a comprehensive view of the entered data. Corrections can be made promptly if any inaccuracies are detected. In the event of data inaccuracies after loading, the system typically generates an error notification, flagging the discrepancy and prompting corrective action.
Furthermore, researchers have the option to conduct a descriptive analysis on the variables, examining the mean, minimum, and maximum values to assess their validity. SPSS Problems Chapter 2
Compute the N, minimum, maximum, and mean for all the variables in the College StudentData.sav file. How many students have complete data? Identify any statistics on the
output that are not meaningful. Explain.
The N, minimum, maximum, and mean for all the variables are shown in Table 1
. 47 students have complete data. The statistics on the output that are not meaningful are the mean values of sex at birth (1.48), the marital status (1.82). Those are inappropriate values for such nominal variables. Table 1
Descriptive Statistics
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BUSI 820 - A1 QUANTITATIVE ANALYSIS
N
Minimu
m
Maximu
m
Mean
student height in inches
50
60
75
67.3
same sex parent's height
50
58
76
66.78
sex at birth
50
1
2
1.48
marital status
49
1
3
1.82
age group
50
1
3
1.96
does subject have children
50
0
1
0.52
amount of tv watched per week
50
4
25
11.98
television shows-sitcoms
50
0
1
0.64
television shows-movies
50
0
1
0.36
television shows-sports
50
0
1
0.52
television shows-news shows
50
0
1
0.46
hours of study per week
50
2
38
15.62
student's current gpa
50
2.4
4
3.172
positive evaluation, institution
50
2
5
3.38
positive evaluation, major
49
1
5
3.27
positive evaluation, facilities
50
1
5
2.76
positive eval, social life
50
1
5
3.1
hours per week spent working
49
0
50
26.12
Valid N (listwise)
47
7
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BUSI 820 - A1 QUANTITATIVE ANALYSIS What is the mean height of the students? What about the average height of the same-sex parent? What percentage of students are males? What percentage have children?
According to Table 1, the mean height of the students is 67.3 inches. The average height of the same-sex parent is 66.78 inches. According to Table 2
, the percentage of students who are males is 52%. According to Table 3, the percentage of students who have children is 52%.
Table 2
Sex at birth
Value
Count
Percent
Standard Attributes
Position
3
Label
sex at birth
Type
Numeric
Format
F8
Measuremen
t
Nominal
Role
Input
Valid Values
1
males
26
52.00
%
2
females
24
48.00
%
8
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BUSI 820 - A1 QUANTITATIVE ANALYSIS Table 3
Does subject have children?
Value
Count
Percen
t
Standard Attributes
Position
6
Label
does subject have children
Type
Numeri
c
Format
F8
Measuremen
t
Nomina
l
Role
Input
Valid Values
0
no
24
48.00
%
1
yes
26
52.00
%
9
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BUSI 820 - A1 QUANTITATIVE ANALYSIS References
Morgan, G. A.; Barrett, K. C.; Leech, N. L.; Gloeckner, G. W. (2020) IBM SPSS for introductory
statistics: Use and interpretation, sixth edition
. Taylor and Francis. Kindle Edition.
10
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