![Oxford University Press | Online Resource Centre | Critical test statistics for Z, T, F and Chi square distributions Oxford University Press | Online Resource Centre | Critical test statistics for Z, T, F and Chi square distributions](https://global.oup.com/uk/orc/orcresources/busecon/business/davis_pecar2e/student/critical_test/critical_test.gif)
Oxford University Press | Online Resource Centre | Critical test statistics for Z, T, F and Chi square distributions
![To know the opinion of the students about the subject statistics, a survey of 200 students was conducted. The data is recorded in the following table. Find the probability. To know the opinion of the students about the subject statistics, a survey of 200 students was conducted. The data is recorded in the following table. Find the probability.](https://d138zd1ktt9iqe.cloudfront.net/media/seo_landing_files/ncert-solutions-class-9-maths-chapter-15-exercise-15-1-question-7-01-1623651148.png)
To know the opinion of the students about the subject statistics, a survey of 200 students was conducted. The data is recorded in the following table. Find the probability.
![Statistical Tables: Statistical Tables for Biological, Agricultural and Medical Research. By Ronald A. Fisher and Frank Yates. Second edition. viii + 96 pp. London: Oliver and Boyd, Ltd. 1943. | Science Statistical Tables: Statistical Tables for Biological, Agricultural and Medical Research. By Ronald A. Fisher and Frank Yates. Second edition. viii + 96 pp. London: Oliver and Boyd, Ltd. 1943. | Science](https://www.science.org/cms/10.1126/science.98.2546.346/asset/df48e6f7-5f0b-4079-bdf2-4c8f388b8c00/assets/science.98.2546.346.fp.png)