Welcome to your Statistics(Senior Class Maths Study by Topics) NAME EMAIL PHONE NUMBER 1. The average marks scored by 10 girls and 15 boys in a Physics test were 60 and 55, respectively, the average mark for the 25 students is 67 54 57 24 None 2. Find the variance and the standard deviation, respectively of the data below16, 18, 12, 14, 20, 25, 13, 15, 11 11. 12.3 1, 13 3.17, 14 17.3, 4.16 None 3. The following marks were obtained by candidates in an examination What is the modal group 51-60 61-70 71-80 41-50 None 4. 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, 34, 6, 4, 5, 7, 4, 5, 6, 7, 2The median score is 4.5 4 5 3 None 5. The scores of a group of students are4, 5, 6, 7, 8.The standard deviation is 3 1.7 2 1.4 None 6. 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. $955 $1955 $3955 $2055 None 7. 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 standard deviation of the salaries of the 20 people. 143 350 282 254 None 8. 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 33 28 39 25 None 9. The following are measures of dispersion except standard deviation mode mean deviation range None 10. The table below shows the masses to the nearest kg of a group of market women.The median of the distribution is 147/2 kg 145/2 kg 73 kg 72 kg None 11. 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 N116,000 N214,000 N56,000 N40,000 None 12. No. of goals 0 1 2 3 4 5Frequency 5 6 12 10 2 1If cF(x) is the number of goals less than or equal to x, then cF(1) and cF(3) are, respectively 11, 33 5, 23 11, 23 6, 10 None 13. Four angles of the sectors of a pie are 84°, 72°, 56° and 78°. If the fifth sector represents a population of 1.6 million, what population will the sector with 56° represent? 1.28 million 1.75 million 2 million 1.5 million None 14. The following data were obtained from the analysis of six observations of a variable x.n = 6, ∑x = 42, ∑x² = 348∑|x-ẋ| = 18, ∑(x-ẋ)² = 70The mean deviation and the variance are, respectively 3 and 1.7 2.3 and 5 0.4 and 3 3 and 11.7 None 15. The table below shows the frequency distribution of a number of pets in 25 houses Find the mode of the distribution 2 5 3 4 None 16. Find the range and interquartile range, respectively, of the following data5, 7, 2, 8, 9, 5, 7, 7, 10, 3, 6, 6 8, 3 5, 2 8, 5 5, 3 None 17. The following data gives the heights to the nearest metre of 55 treesUsing a working mean of 18 or otherwise , calculate the mean height 22.9 14.7 10.0 32 None 18. 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 5 3 6 4 None 19. The table below shows the marks obtained by 8 students taking English and PhysicsThe Standard deviation of English is 15 13.7 12.7 14.7 None 20. The following marks were obtained by candidates in an examination What percentage of the candidates scored above 70 marks? 11.4% 15.2% 4.5% 8.4% None 21. If a 24 hour day is represented on a pie chart, what is the angle of the sector corresponding to the period between 3 pm on a Monday and 6 am on the following Tuesday? 270 degrees 240 degrees 225 degrees 180 degrees None 22. 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 standard deviation N453,083 N10,392.30 N5,083 N45,830 None 23. The following marks were obtained by candidates in an examination Calculate the 42nd percentile 61.5 81.5 51.5 71.3 None 24. Find the mean and mean deviation, respectively of the following -3, -5, -7, 2, 5, 0, 4, 6 0.25, 4 1.72, 1.12 4, 0.35 0.35, 3 None 25. Find the range of the following data1/4, 5/8, 3/10, 2/5, 7/10, 7/8, 3/4 5/8 7/10 3/4 3/5 None 1 out of 25 Time's upTime is Up!