Lowest level of measurement in statistics is nominal.For example, 20% are Catholics, 30% are Protestants and 50% are Mormons.
This is the lowest level of measurement. It is basically used for identification.
The nominal scale.
Ratio level of measurement is the highest in statistics.
The answer will depend on the nature of the data.If the data are qualitative then the only option is the mode.If they are ordinal then you have a choice between the mode and median. The mode may be a better measure when the data are very skewed. Otherwise the median is usually better.For any higher level of measurement is is also possible to calculate the mean. In such cases the median or mean are better. For very skew distributions the median is better but otherwise is should be the mean.
interval
interval
Lowest level of measurement in statistics is nominal.For example, 20% are Catholics, 30% are Protestants and 50% are Mormons.
Sea level.
It can be computer for ordinal level data or higher. It is NOT effected by extremely large or small numbers
This is the lowest level of measurement. It is basically used for identification.
The nominal scale.
The Pacific Ocean is the lowest point in Washington at sea level.
"Centre" for a data set is an imprecise term.The lowest level of measurement is on a nominal scale. There is no reasonable "centre" for data which are nominal. For example, favourite fruit. Some would mention the mode, but this is not "central" in any proper sense of the word.The next level of measurement is on the ordinal scale, which means that the data set can be ordered according to some rule. One example, which is often found in opinion surveys is "Agree strongly / Agree / Disagree / Disagree strongly". or in clothing sizes (XS, S, M, L, XL and so on). Individual data points can be rearranged in this order. Then the centre is the MEDIAN which is the value in the middle position.The next level of measurement is the interval scale, in which each of the data elements has a numerical measurement. In such cases, the median can be used but it is also possible to calculate the MEAN. This is the sum of all the values divided by the count of the values.Finally, there is the ratio scale and both, the median and mean may be used.
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The lowest point on Earth is the Challenger Deep in the Mariana Trench, which has been measured to be about 36,070 feet (10,994 meters) below sea level. This measurement was obtained using advanced sonar and satellite technology to map the ocean floor.
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