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Q.1.Why we study Statistics and explain all type of Statistics and with an example? Q. 2.What is variable and type of variable explain with an

Q.1.Why we study Statistics and explain all type of Statistics and with an example?

Q. 2.What is variable and type of variable explain with an example?

Q. 3.What type of thesample design used in each of the following scenarios and explain why?

A)Each of the 140,000 registered voters in the county is given a number, and 200 people are chosen at random to serve as possible jurors in a medical malpractice trial. 200 numbers are chosen at random from a pool of 140,000 using computer tools. A postcard notifying the individuals with these 200 numbers that they have been chosen for jury duty is sent to them.

B)According to the kind of deductionhome office, state income tax, property taxes, property losses, and charitable contributionsthe Internal Revenue Service seeks to assess how much money taxpayers saved through personal deductions. The amount claimed in each of these categories fluctuates significantly based on the taxpayer's adjusted gross income. Consequently, a straightforward random sample would not be a useful strategy. Based on taxpayers' adjusted gross incomes, the IRS decides to divide them into five categories. From each of these groups, a simple random sample of taxpayers is then drawn.

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