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What is the difference between qualitative and quantitative observations?
Listen to the words qualitative and quantitativeand see the part where it is bold.Qualitative is the way of analysis to a substance through its quality, like reaction to a re-agent etc. (normally chemistry). Quantitative observation however is purely on quantity mass, mass/volume ratio etc. (normally physics).Basically, qualitative observations are descriptions that don't involve numbers or measurements, but, on the other hand, quantitative observations do.
How do you Measure mean value?
You add together all the observations and divide the result by the number of observations.
What additional information is obtained from measurements on an interval scale compared to measurements on an ordinal scale?
whether the measurements are the same or different
What is the upper and lower quartile?
The upper quartile, for a set of ordinal observations, is a value such that a quarter of the observations have a greater value. Similarly, the lower quartile is a value such that a quarter of the observations have a smaller value.
Basic assumption in analysis of variance?
1- observations are from normally distributed populations. 2- observations are from populations with equal variances.
