200 Number receiving aid 180 and that Source: U.S. Department of Education, National Center for Education Statistics. 22. High School Graduation Rates The overall US public high school graduation rate is 73.4%. For Pennsylvania it is 83.5% and for Idaho 80.5%-a difference of 3%. Random samples of 1200 stu- dents from each state indicated that 980 graduated in Pennsylvania and 940 graduated in Idaho. At the 0.05 level of significance, can it be concluded that there is a difference in the proportions of graduating students between the states? the he Source: World Almanac. 23. Interview Errors It has been found that many first- ume interviewees commit errors that could very wel affect the outcome of the interview. An astounding 77%

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