Welcome to your Statistics(Senior Class Maths Study by Topics) NAME EMAIL PHONE NUMBER 1. In a class of 20 students the scores in a Mathematics test out of 10 marks are as follows:5, 3, 6, 7, 8, 4, 5, 4, 9, 3, 4, 6, 4, 5, 7, 4, 5, 6, 7, 2The range of the distribution is 9 8 2 7 2. The following marks were obtained by candidates in an examination Calculate the third quartile 65.3 73 53.8 82.4 3. The scores of students in a class test are given in the table below:Marks 1 2 3 4 5 6 7 8 9 10Frequency 0 3 1 2 3 4 2 1 1 0The modal score is 7 6 4 5 4. The variance and standard deviation of the set of numbers-4, -2, 0, 2, 4 are, respectively 4, 2 64, 8 0, 0 8, 2.8 5. The mean of 25 numbers is 8. If the largest value 32 is removed, what is the mean of the remaining numbers? 5 7 8 6 6. Find the mean and mean deviation, respectively of the following 16, 18, 12, 14, 20, 25, 13, 15, 11 7. The table below shows the weight distribution of a group of potatoes.Weight(g) 1-5 6-10 11-15 16-20 21-25No. of potatoes 3 7 5 3 2What is the mode of the distribution? 9.0 9.8 8.8 8.0 8. The average age of 4 children is 15 years. If the ages of their parents are added, the average age is 25. What is the age of the father if he is 4 years older than his wife? 35 yrs 42 yrs 47 yrs 46 yrs 9. For the set of numbers4, 6, 2, 10, 8, the difference between the range and the variance is -1 2 1 0 10. The diagram shows the distribution of the number of candidates offering Biology(B), Goegraphy(G), Economics(E), French(F) and History(H) in a school certificate class of 60 students. The number of candidates offering Economics is 20 14 16 18 11. The scores of students in a class test are given in the table below:Marks 1 2 3 4 5 6 7 8 9 10Frequency 0 3 1 2 3 4 2 1 1 0The mean score is 5.1 5.0 4.9 4.8 12. Find the mean and mean deviation, respectively of the following 5, -3, 6, -2, 4, -8, 4, 7, -10, 10 3.3, 3.64 2.3, 4.64 1.3, 5.64 4.3, 2.64 13. The scores of a class of students in a test are shown below:Scores 2 3 4 5 6 7No. of students 1 3 5 x 4 2If the average score is 14/3, the value of x is 3 5 6 4 14. The pie chart illustrates the distribution of number of married men (M), married woman (W), bachelors(B), spinsters(S) and children(C) at a social event.The angle representing the total number of married persons is 93° 24° 180° 120° 15. If x is positive, and the standard deviation of x-1, x+1, 3, 2x-1 and x+3 is 2√2, find the value of x and hence calculate the mean deviation x =6 , M.D = 2.4 x=6, M.D = 4.2 x =4, M.D= 2.4 x= 4.3, M.D = 3 16. The table below shows the masses to the nearest kg of a group of market women.The median of the distribution is 73 kg 72 kg 145/2 kg 147/2 kg 17. he frequency table of the monthly salaries of 20 people is shown below. salary(in $) frequency 3500 5 4000 8 4200 5 4300 2 Calculate the mean of the salaries of the 20 people. $2055 $3955 $955 $1955 18. The scores of a group of five students are4, 5, 6, 7, 8.The mean deviation is 2.0 1.5 1.2 1.0 19. The prices of computers in a catalogue are: N125,000, N99,000, N125,000, N120,000, N110,000, N115,000, N130,000, N120,000, N100,000.Calculate the mean deviation N7,354.34 N353 N4,290.23 N8,888.89 20. The following marks were obtained by candidates in an examination Calculate the 42nd percentile 71.3 51.5 61.5 81.5 21. The marks scored by students in a test are recorded in the table belowCalculate the standard deviation 2.13 2.34 1.84 1.34 22. The mean age of a class of twenty school pupils is 12. If their teacher's age is included, the mean becomes 13. The age of the teacher is 28 25 39 33 23. The table below shows the frequency distribution of a number of pets in 25 houses Find the mean of the distribution 3.12 3.25 3.36 4.15 24. The weights to the nearest kg of a group of students are recorded in the following tableCalculate the difference between the mean deviation and the standard deviation 1.6 kg 1.5 kg 1.2 kg 1.3 kg 25. In an experiment, the mean of 25 observations was 6. One of the observations, which has the value of 30, was cancelled. The mean of the remaining observations is 3.5 5 4.8 4.5 1 out of 25 Time is Up! Time's up