统计学 在线作业一（Statistics online homework）.doc

统计学 在线作业一（Statistics online homework） First, radio questions (12 questions, 48 points) V 1., a company plan to require sales growth of 8% over the previous month, an increase of 12%. How far is the completion of the plan (C)?. A. 103.7% B. 50% C. 3.7% D. 150% Full marks: 4 2., the general principle of compiling the index of quantity index is to use (C) as the same measure factor. Quality indicators for the A. reporting period Quantitative indicators for the B. reporting period The quality index of C. base The number of index based D. Full marks: 4 3. a school has 100 faculty members, dividing their pay by 100, which is the average of 100 (C) A. variable B. sign C. variable value D. index Full marks: 4 4. the numerical mean calculated according to the same data is usually different, and the relation between them is (A). A. arithmetic mean geometric mean = = harmonic average B. geometric mean harmonic mean = = arithmetic average C. = harmonic average arithmetic mean geometric mean = D., it doesnt matter Full marks: 4 5. the math test scores of a class are 65, 71, 80 and 87, respectively. These four numbers are (C) A. index B. sign C. variable D. flag value Full marks: 4 6., the key to identifying key surveys and typical surveys is (C). A. surveys vary in number of units B. collects data differently C. determines the criteria for the survey unit differ D. determine the purpose of the investigation unit is different Full marks: 4 7., a bureau will be subordinate enterprises by light and heavy industry classification, and then by enterprise scale grouping, such grouping belongs to (B). A. simple grouping B. composite packet C. Analysis Group D. structure grouping Full marks: 4 8. when a sample is selected by a simple random sampling method, the sample size needs to be expanded to C if the average error of sampling is reduced by 50%. A. 2 times B. 3 times C. 4 times D. 5 times Full marks: 4 The median of 9. is (B). The number of variables that occur most frequently in the