Bar and pie charts are graphical techniques for qualitative data. The former focus the attention on the frequency of the occurrences of the categories, and the later emphasize the percentage of occurrences of each category.

Identify each of the following variables as either “quantitative” or “qualitative”. The brands of ice cream that you purchase. The daily high temperature for the last four weeks. The amount of sugar consumed by Americans in one year. The species of fish in the zoo. The lengths of time children wait for the school bus.

The Empirical Rule can be applied to any numerical data set.

If the manager of a grocery store wishes to display the sales trend, the most effective type of graph will be:

Q 37- 40137    BA56Using the above element barium,  provide the answers to the following questions :How many neutrons does barium have?Identify the Z number  Mass number of bariumHow many nucleons does barium have?

Matter occupies space and has shape and mass. Which of the following is not matter.

Q 33-36207    Pb82Using the element above Lead provide the answers to the following questions :Identify the atomic number Identify the mass number of leadHow many neutrons does lead have?How many nucleons will lead include?

The maximum amount of electrons that can occupy the P shell

A negative ion is ______________

If an atom has more protons than electrons, which charge will it have