To interpolate is to insert values between other values. To extrapolate is to estimate or predict values by projecting from known values. Interpolation is common, and usually quite safe. For example, when you construct a graph by drawing a line between measured data points you are interpolating all the values between those that were measured. Your assumption is that if you had measured them they would result in values similar to those the line crosses.
Extrapolation is sometimes necessary, however, often has low reliability.
Maximum The maximum number is the largest value in a series of numbers. The minimum number is the smallest value in a series of numbers. Protocol The plan that will be followed in conducting a scientific experiment. A qualitative description of the same man might be quite tall and very thin. Qualitative A descriptive representation of the state of an observed parameter.