28/03/2020 Statistics(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 following data gives the heights to the nearest metre of 55 treesUsing a working mean of 18 or otherwise , calculate the mean height22.914.710.0322. 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 is180°93°120°24°3. The following marks were obtained by candidates in an examination Calculate the median12.954.610.845.74. 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 is56345. Find the mean and mean deviation, respectively of the following -3, -5, -7, 2, 5, 0, 4, 60.35, 31.72, 1.120.25, 44, 0.356. The marks scored by students in a test are recorded in the table belowCalculate the standard deviation1.842.341.342.137. The following marks were obtained by candidates in an examination What is the modal group71-8051-6041-5061-708. 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 deviationN4,290.23N8,888.89N7,354.34N3539. The diagram illustrates the distribution of marks in a class testThe percentage of students who scored less than 5 marks is50%67%75%33%10. 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 is40 %50%75/2 %35/2 %11. The distribution of a housewife's expenditure on four food items is as follows:Item A (£80), Item B (£45), Item C (£30), Item D (£25). The sum of the angles of the sectors representing the expenditure on items B and D is140902207012. Find the range of the following datax+2, x-5, x+6, x-2, x-7, x+3, x-10, x-112x+416x-213. 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 is276 degrees84 degrees228 degrees48 degrees14. The average age of the three children in a family is 9 yr. If the average age of their parents is 39 yr, the average age of the whole family is20 yr21 yr27 yr24 yr15. 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, 235, 236, 1011, 3316. The scores of a group of students are4, 5, 6, 7, 8.The standard deviation is1.4321.717. 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 is1816142018. The pie chart below shows the distribution of the expenditure of a household on various food items in a certain month. If N200 was spent on fruits, how much was spent on rice?N600N1,000N400N80019. The marks scored by students in a test are recorded in the table belowCalculate the mean5.672.324.784.3420. Class 1-3 4-6 7-9Frequency 5 8 5The standard deviation of the frequency distribution in the table above is12.552.221. 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 is1725201522. The table below shows the frequency distribution of a number of pets in 25 houses Find the median of the distribution437523. The total income of a household for one year is N60,000. This amount is spent on rent(R), food(F), education for the children(E), general maintenance(G) and miscellaneous items(M).The amount spent on miscellaneous items isN20,000N25,000N17,500N16,00024. The diagram illustrates the distribution of marks in a class testThe total number of students who sat for the test is4036483525. 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 is968010012026 out of 25Time is Up! Time's up
