Dear Sidhharth,
When I was handling Injection molding I preferred to look at the output instead of the parameters which as you have found are quite well controlled via the closed loop systems our new machines are capable of, per
"While reviewing the data I realized that the values are closely stacked and very close to each other. In fact there were a few points with the same value."
This creates problems for statistical programs like Minitab as there is hardly any variation to speak of and falls into the category of "inadequate measurement units" which you may like to search to get a better insight into what you are dealing with.
Yours sincerely,
Ernest