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 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 1.5 kg 1.3 kg 1.6 kg 1.2 kg2. 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 median of the distribution is 11 10 10.5 9.53. 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 33 25 394. Find the variance and the standard deviation, respectively of the data below-3, -5, -7, 2, 5, 0, 4, 6 4.52, 20.2 12.3, 17 12.6, 19 20.4, 4.525. 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. $955 $3955 $1955 $20556. The table below shows the heights to the nearest cm of a group of peopleCalculate an estimate of the mean 25.5 cm 151.5 cm 10.3 cm 59.5 cm7. The following marks were obtained by candidates in an examination Calculate the third quartile 82.4 53.8 65.3 738. 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? 5 1 3 79. The marks scored by students in a test are recorded in the table belowCalculate the mean 5.67 4.78 2.32 4.3410. 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 8 2 9 711. The following marks were obtained by candidates in an examination What is the modal group 61-70 41-50 51-60 71-8012. The table below shows the frequency distribution of a number of pets in 25 houses Find the median of the distribution 3 7 5 413. The following data gives the heights to the nearest metre of 55 treesUsing a working mean of 18 or otherwise, calculate the standard deviation 11.2 m 7.1 m 10.3 m 8.3 m14. 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 is 3 10 11 915. 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 range N31,000 N4,000 N23,000 N6,00016. The table below shows the heights to the nearest cm of a group of peopleCalculate an estimate of the standard deviation 23 cm 6.7 cm 4.3 cm 11.2 cm17. 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 32 22.9 10.018. The scores of a group of five students are4, 5, 6, 7, 8.The mean deviation is 1.2 1.0 2.0 1.519. For the set of numbers4, 6, 2, 10, 8, the difference between the range and the variance is 1 2 0 -120. 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= 4.3, M.D = 3 x =4, M.D= 2.4 x=6, M.D = 4.221. The table below shows the masses to the nearest kg of a group of market women.The percentage of the women with mass not less than 74kg is 35/2 % 50% 40 % 75/2 %22. The table below shows the marks obtained by 8 students taking English and PhysicsThe Standard deviation of English is 13.7 14.7 15 12.723. Find the range of the following datax+2, x-5, x+6, x-2, x-7, x+3, x-10, x-1 12 x+4 16 x-224. Find the variance and the standard deviation, respectively of the data below16, 18, 12, 14, 20, 25, 13, 15, 11 3.17, 14 1, 13 17.3, 4.16 11. 12.325. 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 of the sector representing spinsters is 48° 45° 24° 36°26 out of 25Time is Up!