帮我回答一下一个统计的选择题,英文的

帮我回答一下一个统计的选择题,英文的
Penny Bauer,Chief Financial Officer of Harrison Haulage,suspects irregularities in the payroll system,and orders an inspection of ‘each and every payroll voucher issued since 1 January 2005 to determine the percentage of irregular vouchers’.The percentage which Penny ordered is a
Choose one answer.
sample statistic
sample parameter
sorted order
population parameter