Welcome to your Statistics(Senior Class Maths Study by Topics) NAME EMAIL PHONE NUMBER 1. The following data gives the heights to the nearest metre of 55 treesUsing a working mean of 18 or otherwise , calculate the mean height 14.7 10.0 22.9 322. The table below shows the frequency distribution of marks scored by students in a class test:Score 1 2 3 4 5Frequency x+2 x-1 2x-3 x+4 3x-4 If the average score is 43/14, how many students scored 3 points? 3 7 5 13. The following marks were obtained by candidates in an examination Calculate the median 12.9 54.6 45.7 10.84. 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 is 84 degrees 228 degrees 48 degrees 276 degrees5. 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 7 2 9 86. 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? 2 million 1.5 million 1.75 million 1.28 million7. 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 3 4.58. The marks scored by students in a test are recorded in the table belowCalculate the mean 2.32 5.67 4.34 4.789. The following are measures of central tendency except mode mean deviation mean median10. The following data gives the heights to the nearest metre of 55 treesUsing a working mean of 18 or otherwise, calculate the standard deviation 8.3 m 10.3 m 7.1 m 11.2 m11. The table below shows the heights to the nearest cm of a group of peopleCalculate an estimate of the mean 10.3 cm 151.5 cm 59.5 cm 25.5 cm12. The table below shows the masses to the nearest kg of a group of market women.The median of the distribution is 73 kg 147/2 kg 72 kg 145/2 kg13. Find the variance and the standard deviation, respectively of the data below-3, -5, -7, 2, 5, 0, 4, 6 12.3, 17 20.4, 4.52 12.6, 19 4.52, 20.214. The following marks were obtained by candidates in an examination What percentage of the candidates scored above 70 marks? 15.2% 8.4% 4.5% 11.4%15. A sector on a pie chart representing the number of students offering Physics has an angle 0f 24°. If 8 students offer Physics, the total number of students in the class is 96 80 120 10016. The distribution of grades in a Mathematics examination taken by a class of 72 students is represented on a pie chart. If the angle of the sector representing the number of students who scored the A grade is 30°, the actual number of A grades scored is 12 9 6 817. The table below shows the heights to the nearest cm of a group of peopleCalculate an estimate of the standard deviation 11.2 cm 6.7 cm 4.3 cm 23 cm18. The distribution of grades in a Mathematics examination taken by a class of 72 students is represented on a pie chart.If 54 students passed the examination , the angle of the sector corresponding to the number of failures is 120 degrees 90 degrees 60 degrees 45 degrees19. Find the range and interquartile range, respectively, of the following data5, 7, 2, 8, 9, 5, 7, 7, 10, 3, 6, 6 8, 5 5, 2 5, 3 8, 320. The marks scored by students in a test are recorded in the table belowCalculate the standard deviation 1.84 2.13 2.34 1.3421. 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 2522. The diagram illustrates the distribution of marks in a class testThe average and the modal marks scored are, respectively 4.7, 5 4.7, 4 5, 4 4, 523. The angles of the sectors representing the numbers 5, 8, 12, 15, 20 on a pie chart are respectively, 40, 64, 96, 120, 160 degrees 15, 24, 36, 45, 60 degrees 30, 48, 72, 90, 120 degrees 5, 8, 12, 15, 20 degrees24. The following table shows the grouped data, in classes, for the heights of 50 people. height (in cm) - classesfrequency120 <- 1302130 <- 1405140 <- 15025150 <- 16010160 <- 1708 Calculate the standard deviation of the salaries of the 20 people. 2.3 6.7 11.0 9.925. The marks scored by students in a test are recorded in the table belowCalculate the median 5 6 4 326 out of 25Time is Up!