Data Analysis & Research

Data Analysis & Research At Data Analysis & Research, we demonstrate the appropriate use of statistical test and results interpretation. We also engage in commercial data analysis

There are several sample size estimating formulae in research. However one can rely on a previous or pilot study to esti...
16/04/2025

There are several sample size estimating formulae in research. However one can rely on a previous or pilot study to estimate the sample size using Power Analysis. Here, I have demonstrated in SPSS v27, how to estimate sample size using proportions. Kindly follow me on YouTube by subscribing to my channel using the link below

This video tutorial demonstrates the step-by-step method for estimating sample size using power analysis for a variable in frequency and proportions. The sta...

How do transform a continuous variable into a categorical variable in SPSS? Subscribe to my YouTube channel and watch th...
26/02/2025

How do transform a continuous variable into a categorical variable in SPSS? Subscribe to my YouTube channel and watch the video tutorial using the link below

This video tutorial will show you the simple steps to follow when transforming a continuous variable into a categorical one

In this latest publication, the agreement between the serum creatinine- and cystatin C-based CKD-EPI estimating equation...
30/01/2025

In this latest publication, the agreement between the serum creatinine- and cystatin C-based CKD-EPI estimating equations for GFR was determined in pregnancy and non-pregnant women. Kindly read further for more details

PDF | Introduction: The serum cystatin C (sCys)-based estimated glomerular filtration rate (eGFRcys) is usually preferred to that of serum creatinine... | Find, read and cite all the research you need on ResearchGate

In this study, the Twin Testosterone Transfer (TTT) hypothesis was tested for the first time in a Ghanaian population re...
30/01/2025

In this study, the Twin Testosterone Transfer (TTT) hypothesis was tested for the first time in a Ghanaian population regarding the 2D:4D ratio as the putative marker of prenatal testosterone exposure. You are invited to explore this study

PDF | The twin testosterone transfer (TTT) hypothesis posits that females with male co‐twins (opposite‐sex, OS) might develop male‐typical traits due to... | Find, read and cite all the research you need on ResearchGate

Although there are many formulas for calculating sample sizes in different studies based on the design, sample sizes can...
19/12/2024

Although there are many formulas for calculating sample sizes in different studies based on the design, sample sizes can also be estimated based on the results of a previous or pilot study using power analysis in SPSS. SUBSCRIBE to my YouTube channel using the link below

This tutorial will show you how to determine the sample size for an independent t-test using results from a previous or a pilot study in SPSS

In analyzing data, you sometimes have to compute or create new variables especially if those variables are derived or ca...
02/12/2024

In analyzing data, you sometimes have to compute or create new variables especially if those variables are derived or calculated from existing ones. One such variable is the body mass index or BMI. SPSS has a feature that can be used to compute new variables from existing variables. Watch the video tutorial and also subscribe to my YouTube channel by following the link below

This tutorial will show you how to compute a new variable in SPSS

The Bland-Altman plot is used to compare two methods to determine their level of agreement. While this plot can be creat...
30/10/2024

The Bland-Altman plot is used to compare two methods to determine their level of agreement. While this plot can be created using various statistical software, it is quite easier when using MedCalc. Subscribe to my YouTube channel for more free tutorials by following the link below

This video tutorial will show you the simple steps to follow to create a Bland-Altman plot or analysis in MedCalc

The Cochran’s Q test is used to compare multiple related samples where the data is categorical in their distribution. Th...
11/10/2024

The Cochran’s Q test is used to compare multiple related samples where the data is categorical in their distribution. This free tutorial will show you how test is performed in SPSS. Follow me on YouTube by subscribing to my channel using the link below

This free tutorial will show you how to determine differences between multiple related samples where the data is categorical

The McNemar test is a nonparametric statistical test used to assess differences in the distribution of categorical data ...
23/09/2024

The McNemar test is a nonparametric statistical test used to assess differences in the distribution of categorical data between two related samples, such as in pre- and post-test studies. It’s particularly useful for evaluating changes in paired data. SPSS provides a straightforward process to conduct this test. To learn more, subscribe to my YouTube channel using the link below.

The McNemar Test is used to determine differences in data distribution between two related samples where the data is categorical

Extreme outliers in a dataset can significantly distort the results of your data analysis, leading to misleading P-value...
19/09/2024

Extreme outliers in a dataset can significantly distort the results of your data analysis, leading to misleading P-values that do not accurately reflect the true nature of the data. It’s important to identify and handle these outliers before conducting any analysis. SPSS offers a simple method to detect and manage extreme outliers. For more tutorials like this, consider subscribing to my channel using the link below:

This tutorial will show the simple steps to follow to detect extreme outliers in SPSS.

During data analysis, you may want to recode a variable to a different variable while keeping the original variable. Thi...
19/09/2024

During data analysis, you may want to recode a variable to a different variable while keeping the original variable. This I have demonstrated in SPSS.

Follow me on YouTube by subscribing to my channel

This tutorial will show you how to recode a variable into variable while retaining the original variable

In data analysis, you may want to perform subgroups analysis. This can easily be done if you split the data such that an...
18/09/2024

In data analysis, you may want to perform subgroups analysis. This can easily be done if you split the data such that any analysis you perform is in duplicate or triplicate etc. I have demonstrated this in SPSS.

To know more about practical biostatistics, follow me by subscribing to my YouTube channel

This video shows you to split data when you want to perform subgroup analysis. You do not need to create separate sheets for each subgroup as that will be a ...

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