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Population Parameters and Sample Statistics Practice 1. For each statement, identify whether the numbers underlined are statistics or parameters. a, Of all U.S. kindergarten teachers, 32% say that knowing the alphabet is an essential skill. Parameter b. Of the 800 U.S. kindergarten teachers polled, 34% say that knowing the alphabet is an essential skill. tat istic 2. Of the U.S. adult population, 36% has an allergy. A sample of 1200 randomly selected adults resulted in 33.2% reporting an allergy. a. Describe the population. Y5 Adults. b. What is the sample? \}00 A dults, c. Describe the variable. Having ak allergy. d. Identify the statistic and give its value. 43, Qo e. Identify the parameter and give its value. 3 fo 3. In your own words, explain why the parameter is fixed and the statistic varies. A Parameter wepresents everyone ih a fited group. A Statistic vepresents a sample and will vavy. 4. The admissions office wants to estimate the cost of textbooks at USC. Let the variable x be the total cost of all textbooks purchased by a student this semester. The plan is to randomly identify 100 students and obtain their total textbook costs. The average cost for the 100 students will be used to estimate the average cost for all students. a. Describe the parameter the admissions office wishes to estimate. Cos t ot +eXthoo ks at Vp, b. Deseribe the population. Al| 644 dents af USC. c. Describe the variable involved. To ta { cost of ferhao Ks by Qa Student 4Wis Semester. d. Describe the sample. \00 van dom Students. e. Describe the statistic and how you would use the 100 data values collected to calculate the statistic. Total cost of texthoo ks for (00 students; Find 5. Select 10 students currently enrolled at USC and collect data for these three variables. 1) Number of the courses enrolled in. 2) Total cost of textbooks and supplies. 3) Method of payment used for textbooks and yeah supplies. a. What is the population? All 5 dudents envo led at USC. b. What is the sample? |() students Cubvently ehvolled at USC. 
