Ph.D.

Quantitative research is more scientific because of reliability of the results as we study relatively large numbers of people and to use computers to analyse the data. Here the questions are close ended question.

But in Qualitative research  the size of sample is less in comparison to quantitative research. The data collected will be non-numerical and it would be difficult to draw same conclusion if given to different experts.The questions are open ended.

We can have one of the three research method viz Quantitative, Qualitative and mixed method. Normally, we relate close ended questions, numbers and analysis using scientific tools with the Quantitative research while open ended questions, interviews etc with Qualitative research. 

For pure science subjects like Physics, Chemistry, etc we may have rigid Quantitative method. Similarly, for most of the research topics related to languages like Hindi literature, Sanskrit, English literature, etc we may only have Qualitative research.

However, for most of the social sciences subjects like Management, Psychology, Education, etc, a mix of Quantitative and Qualitative research is possible. Depending upon topic of research, research design, we may have more of Quantitative methods than Qualitative methods or vice versa. The mixed approach may provide more complete understanding of a research problem then using any one or single approach.

Additional reading:

Creswell, J.W. (2014) Chapter One: The selection of a research approach. In: Creswell, J.W. Research design: qualitative, quantitative, and mixed methods approaches. SAGE. Pp.3-23

Quantitative research is explaining phenomena by collecting numerical data that are analysed using mathematically based methods while qualitative research seeks to answer questions about why and how people behave in the way that they do. It provides in-depth information about human behavior.Thus both the researches are specific in their areas of application.

Most of the researchers rely on above mentioned two research methods i.e, qualitative and quantitative for a systematic search. Both the research methods have equal benefit to the specific subject areas where they apply.

To make an object of systematic  search in smaller groups with more depth and when it is difficult  to quantify  responses, then qualitative  research is applied.

On the other hand, when it is mandatory to produce repeatable data that has demands for future use and also scientifically valid then quantitative research gain interest over qualitative one.

In summary, quantitative research methodology is most popular to quantify numbers and/or data and to establish cause and effect relationship between variables with the help of statistical tools.

Both researches  are scientific and systematic. The accuracy of quantitative research is more but where we can't  apply this research in someares, there quantitative  research  has its more importance. Ultimately  both researches  give solution and conclusion for society. So we can't neglect qualitative research & it's importance of studying behaviour, social phenomena etc. Both the researches support each others, we can do mixed reseaches also.

Yes,I agree this, because ,if you research something, everybody wants proof and they want to check the research conclusion.In case of quantitative research results remain same in all the time or approximately equal.but in qualitative research conclusion may be change according to the researcher's views .so quantitative research is more scientific than qualitative research.

I also believe that quantitative research is more scientific in comparison of qualitative research.because quantitative research based on numbers is more generalizable.while qualitative research which is based on text is less generalizable.

yes, though its quantitative and easy to visualize the results in terms of number might be convenient.In case of qualitative explanatory things at higher side.But personally I do feel that qualitative is more valid than quantitative.Specially when we take human factor  into consideration  . 

for example;One might lose data in counting/figuring exact number of  the heart beat of a mother scientifically .

Both the research are equally important as it depends on the nature of enquiry which to use.... Both the research have equally importance in the area of research.... 

Generally, it can not be said that Qualitative research is more scientific than Qualitative research. Because both types of research methods are important and each research method has its strengths and weaknesses. Which research method can be best and beneficial depends on disciplines, research problems, and research objectives. Mainly Quantitative, Qualitative and Mixed Methods are used in research. In Social Sciences, types of Mixed-Method research are used. 

So, Quantitative and Qualitative both are complementary to each other.

Quantitative analysis is scientific ,based on figure. It becomes easy to generalize in terms of number.where as qualitative analysis represent quality.if we think in terms of data quantitative research lacks in covering various aspects of data attached to perception and experience factors.