28/03/2020Statistics(Senior Class Maths Study by Topics) 0Comments by Gate Academy Welcome to your Statistics(Senior Class Maths Study by Topics) NAME EMAIL PHONE NUMBER 1. The table below shows the frequency distribution of a number of pets in 25 houses Find the mean of the distribution3.253.123.364.152. The following data gives the heights to the nearest metre of 55 treesCalculate the interquartile range22.9810.982012.733. The weights to the nearest kg of a group of students are recorded in the following tableCalculate the median weight24.5 kg43.4 kg56.4 kg52.5 kg4. 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?1.5 million2 million1.28 million1.75 million5. The mean of 25 numbers is 8. If the largest value 32 is removed, what is the mean of the remaining numbers?87566. 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 is141820167. The following marks were obtained by candidates in an examination What percentage of the candidates scored above 70 marks?8.4%4.5%11.4%15.2%8. The following are measures of dispersion exceptmean deviationrangestandard deviationmode9. The table below shows the marks obtained by 8 students taking English and PhysicsCalculate the mean of English subject6585457510. The following are measures of central tendency exceptmean deviationmedianmodemean11. 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, respectively11, 236, 1011, 335, 2312. Find the range and interquartile range, respectively, of the following data20, 30, 25, 28, 35, 25, 20, 27, 2415, 312, 511, 415, 713. he frequency table of the monthly salaries of 20 people is shown below. salary(in $)frequency35005400084200543002 Calculate the mean of the salaries of the 20 people.$2055$1955$3955$95514. 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 2The mean of the distribution is10 g11.5 g11 g10.5 g15. 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 deviationN7,354.34N353N4,290.23N8,888.8916. 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 number of students who scored at least 5 is11103917. The table below shows the marks obtained by 8 students taking English and PhysicsThe standard deviation for Physics is1219.8242118. The following marks were obtained by candidates in an examination Calculate the median12.945.710.854.619. The heights of eight children are: 1 m, 1.2 m, 0.9 m, 0.8 m, 1.4 m, 0.8 m, 1.2 m and 1.1 m. The sum of the mean and the range is2.45 m1.11 m1.85 m1.65 m20. 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 number of students who took the test is1525172021. The numbers 2, 5, 7, 8, 10, 15 and 13 are represented on a pie chart . The sum of the angles representing all numbers equal to or greater than 8 is84 degrees48 degrees276 degrees228 degrees22. Find the mean and mean deviation, respectively of the following 16, 18, 12, 14, 20, 25, 13, 15, 1123. The mean of the prime number 1 and 20 is 77/8. When another prime number is added, the mean becomes 40/3 find the new prime number2343313324. The following data gives the heights to the nearest metre of 55 treesUsing a working mean of 18 or otherwise, calculate the standard deviation10.3 m11.2 m7.1 m8.3 m25. Find the variance and the standard deviation, respectively of the data below-3, -5, -7, 2, 5, 0, 4, 612.3, 174.52, 20.220.4, 4.5212.6, 1926 out of 25Time is Up!
