8-data analysis-6

© 2009 -2011 tutorco.com 1 In a school a survey was conducted amongst 30 teachers to know how many languages they know and the results are recorded. Answer questions 1-2 on the basis of given data. 4 2 1 3 3 3 4 2 3 1 3 3 4 5 6 5 1 2 5 2 1 1 2 3 4 2 4 5 2 3 Q1. Make the frequency distribution table for the above data. Q2. Represent the above data in a bar graph. GRADE 8 TOPIC: DATA ANALYSIS 8/2/6/S © 2009 -2011 tutorco.com 2 Q3. Find the angles for the following budget of a family to represent it in a pie-chart. RENT FOOD CLOTHING EDUCATION SAVING MISCELLANEOUS $240 $480 $180 $120 $120 $60 Q4. The following table shows the market position of different brands of soap. Find the angles for the given data to represent the information in the pie-chart. Brand % Buyers A 60 B 20 C 15 Others 5 Q5. The following table shows the expenditure per $1200 of a motor company. Find the angles for the given data to represent the information in the pie-chart. Wages $350 Materials $320 Taxation $360 Profits $120 Administration $50 Total $1,200 © 2009 -2011 tutorco.com 3 A nationwide survey showed that 85% of all children in the United States like watching TV. Q6. If 3 children are chosen at random, what is the probability that all 1 will like watching TV and the other two will dislike watching TV? The rainfall in a town in a week is recorded and a bar chart is plotted Study the following bar chart and answer question 7-9. Q7. What was the rainfall recorded on Tuesday? Q8. What was the minimum rainfall recorded? Q9. What was the maximum rainfall recorded? © 2009 -2011 tutorco.com 4 The following histogram shows the marks obtained by students in the final exam. Answer questions 10-12 based on the histogram. Q10. How many students got marks in the range of 0-20? Q11. If the pass mark is 40, how many students have failed? Q12. How many students took part in the survey, and therefore find out how many students passed the exam? © 2009 -2011 tutorco.com 5 Study the following data and answer the questions 13-16 Q13. Find the median of the above data? Q14. Find the 1st quartile of the above data? Q15. Find the 3rd quartile of the above data? Q16. Plot the box plot for the above data? © 2009 -2011 tutorco.com 6 A below box plot is made up with certain data. Study the box plot and answer the questions 17-19. Q17. Find the median? Q18. Find the 1st quartile? Q19. Find the 3rd quartile? Q20. What is the probability of getting a 3 of clubs on the first draw from a deck of cards? © 2009 -2011 tutorco.com 7 Q21. What is the probability of getting an 8 numbered card? Q22. What is the probability of getting a jack or a queen or a king on the first draw from a deck of cards? Q23. What is the probability of getting a diamond ace on the first draw from a deck of cards? Q24. A nationwide survey found that 72% of people in the United States like watching movies. If 3 people are selected at random, what is the probability that two like movies and one does not like movies? Q25. A school survey found that 8 out of 10 students like baseball. If three students are chosen at random with replacement, what is the probability that all three students like baseball?