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 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 is151720252. 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 yr24 yr21 yr27 yr3. 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 is11 g10 g10.5 g11.5 g4. The following data gives the heights to the nearest metre of 55 treesUsing a working mean of 18 or otherwise , calculate the mean height14.73210.022.95. The diagram illustrates the distribution of marks in a class testThe average and the modal marks scored are, respectively4.7, 54.7, 44, 55, 46. Find the range and interquartile range, respectively, of the following data5, 7, 2, 8, 9, 5, 7, 7, 10, 3, 6, 65, 38, 58, 35, 27. In an experiment, the mean of 25 observations was 6. One of the observations, which has the value of 30, was cancelled. The mean of the remaining observations is220.127.116.118. 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 is93°24°120°180°9. 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 is961001208010. The following are measures of central tendency exceptmeanmean deviationmodemedian11. 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?N400N1,000N600N80012. 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 degrees276 degrees48 degrees228 degrees13. The following are measures of dispersion exceptrangemean deviationmodestandard deviation14. The average age of 4 children is 15 years. If the ages of their parents are added, the average age is 25. What is the age of the father if he is 4 years older than his wife?47 yrs42 yrs35 yrs46 yrs15. In a certain country last year a total of 500 million tons of trash was recycled. The chart below shows the distribution, in millions of tons, for the different types of trashes. How many tons of Iron/Steel was recycled?15%13%14%12%16. The mean of 25 numbers is 8. If the largest value 32 is removed, what is the mean of the remaining numbers?876517. The table below shows the frequency distribution of a number of pets in 25 houses Find the median of the distribution734518. 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 is45 degrees90 degrees60 degrees120 degrees19. 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 deviationN7,354.34N4,290.23N8,888.89N35320. For the set of numbers:1, 2, 3, 4, 4, 5, 6, 7, 8, 10the mean, mode and median are, respectively4.5, 4 and 4.55, 4 and 4.55, 4 and 44.5, 4 and 521. The following data gives the heights to the nearest metre of 55 treesUsing a working mean of 18 or otherwise, calculate the standard deviation11.2 m10.3 m8.3 m7.1 m22. 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 is792823. 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 rangeN4,000N6,000N23,000N31,00024. The variance and standard deviation of the set of numbers-4, -2, 0, 2, 4 are, respectively64, 80, 04, 28, 2.825. 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 2What is the mode of the distribution?9.09.88.08.826 out of 25Time is Up!