What is accuracy? the same as precision it refers to how closely individual measurements agree with each other. it referes to how closely a measured value agrees with the correct value. it increases with the number of measurements.

It referes to how closely a measured value agrees with the correct value.

Explanation:

Accuracy -

It means the closeness of the data to a specific vale , is called as accuracy .

In order to find the accurate number or value from a set of data ,

The easiest method is ,

The data which is nearest to the average vale of the given data , will be the accurate vale .

hence , from the given statement , the correct statement for the definition of accuracy is the third statement .

the answer is 0.42 is that is an option. this question provides no info

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.