An accounting audit company has been hired to check financial transitions of a law firm conducted during the past 365 days. It turns out that the law firm has conducted 1250 transactions over the past year. To start with, the audit company has randomly selected 110 transactions and has started looking into details of them.

1)These 110 transactions form a ?

a.Sample b. Population c. Sample statistic d. Population parameter

2) The variance of the amount of all transactions over the past year is a ?

a.Population b. Sample c. Census d. Parameter

3) The average of the amount of 110 selected transactions is a ?

a.Sample b. Statistic c. Parameterd. Census

4)Which one of the following charts the audit company can use to visualize the amount of transactions?

a.scatter plotb. pie chart c. histogramd. bar chart