For goodness of fit test using Chisquare test, Expected frequency = Total number of observations * theoretical probability specified or Expected frequency = Total number of observations / Number of categories if theoretical frequencies are not given. For contingency tables (test for independence) Expected frequency = (Row total * Column total) / Grand total for each cell
Chi-square is a statistic used to assess the degree of the relationship and degree of association between two nominal variables
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Smell. Density test. Reactivity test. PH test.
Yes because it has specific properties. It go through a five category test.
why the tensile properties of most brittle materials are accessed by transverse bending tests and not ascertain by tensile tests
Well a geologist can test for many things and it is loosely based around having a blood test for a wide range of STD's this is very important to the properties in that it all relies on the answer.
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Yes, but lab will confirm the drug properties as no harmful.
Some coins, such as the U.S. penny and nickel, are magnetic due to their composition. You can test their magnetic properties by using a magnet to see if the coin is attracted to it. If the coin sticks to the magnet, it is magnetic.
Testing serveral properties is useful because some minerals many have similar or the same properties as each other. Testing several properties greatly reduces the chances of a misidentification.
Because a lot of them hold medicinal properties that could be used in pharmaceuticals. They also test them for pollution.