# Data Analysis

## Questionnaire- Types, Format, Questions

Questionnaire Overview A questionnaire includes questions and other elements to elicit data suitable for the study. The questionnaire may be viewed as a paper-based interview. The creation of a questionnaire follows a structure similar to that of the interview schedule. However, due to the questionnaire’s impersonal nature, its development requires even more attention. Due to …

## Null Hypothesis vs Alternative Hypothesis With 9 Differences

Null Hypothesis vs Alternative Hypothesis Null Hypothesis Definition The null hypothesis is a general declaration that there is no association between the phenomena under investigation or that there is no connection between the groups under investigation. Generally, a hypothesis is an assertion that hasn’t been sufficiently supported by the available data. Thus, the idea a …

## Questionnaire Method of Data Collection: An Overview

Questionnaire Method of Data Collection: An Overview A questionnaire is a research instrument utilized to gather information from respondents and includes a set of questions and potential answers printed or typed in a certain order on a form. The subjects of the surveys are often sent or distributed by postal service along with a demand …

## Quantitative Vs Qualitative Data: Definition, Differences, and Examples

Quantitative Vs. Qualitative Data – Definition Qualitative data is information focused on descriptions that can be witnessed but cannot be computed. On the other hand, quantitative information focuses on numbers and mathematical calculations and can be calculated. So, the collection of data and evaluation may be done using any of the two methods indicated above. …

## T-Test: Definition, Formula, Types, Applications, Example

T-test Definition While the population’s standard deviation is unclear, the t-test is a statistical test employed to evaluate hypotheses about the mean of a small sample population. The t-test is utilized to determine whether there is a significant difference between the means of the two groups. To determine if a method impacts both samples or …

## Z-Test- Definition, Formula, Examples, Uses, Z-Test Vs T-Test

Z Test Definition To compare or evaluate the importance of several statistical studies, particularly the mean of a sample from a population having a normally distributed or between two independent samples, one can apply a statistical test known as the z-test. The similar normal probability distribution that underlies t-tests also underlies z-tests. The z-test is …