Welcome to your Statistics(Senior Class Maths Study by Topics) NAME EMAIL PHONE NUMBER 1. 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?35 yrs47 yrs46 yrs42 yrs2. For the set of numbers4, 6, 2, 10, 8, the difference between the range and the variance is102-13. 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 is10.59.510114. Number 1 2 3 4 5 Frequency 1 3 2 3 1The variance of the frequency distribution in the table above is11.41.51.25. Find the range and interquartile range, respectively, of the following data20, 30, 25, 28, 35, 25, 20, 27, 2412, 515, 315, 711, 46. The table below shows the marks obtained by 8 students taking English and PhysicsCalculate the mean of English subject758565457. The following are measures of central tendency exceptmeanmedianmodemean deviation8. 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 is251517209. The following data gives the heights to the nearest metre of 55 treesCalculate the interquartile range2012.7322.9810.9810. 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 is11.5 g11 g10 g10.5 g11. The following marks were obtained by candidates in an examination Calculate the third quartile7353.865.382.412. 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?N400N600N1,000N80013. The table below shows the frequency distribution of a number of pets in 25 houses Find the mode of the distribution543214. The following data gives the heights to the nearest metre of 55 treesUsing a working mean of 18 or otherwise, calculate the standard deviation7.1 m10.3 m11.2 m8.3 m15. No. of goals 0 1 2 3 4 5Frequency 5 6 12 10 2 1The total number of goals scored by all the teams is7370787216. The following are measures of dispersion exceptmean deviationstandard deviationrangemode17. 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 is24 yr27 yr21 yr20 yr18. The following marks were obtained by candidates in an examination Calculate the 42nd percentile71.381.551.561.519. The mean weights of three groups of students are 40kg, 45kg and 50kg respectively. If the number of students in the groups are 45, 30 and 25 respectively,the mean weight of all the students is45 kg46 kg44 kg43 kg20. The following data were obtained from the analysis of six observations of a variable x.n = 6, ∑x = 42, ∑x² = 348∑|x-ẋ| = 18, ∑(x-ẋ)² = 70The mean deviation and the variance are, respectively2.3 and 53 and 11.70.4 and 33 and 1.721. The table below shows the masses to the nearest kg of a group of market women.The median of the distribution is73 kg147/2 kg72 kg145/2 kg22. 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 standard deviationN45,830N5,083N453,083N10,392.3023. 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 deviationN353N4,290.23N7,354.34N8,888.8924. Find the mean and mean deviation, respectively of the following 5, -3, 6, -2, 4, -8, 4, 7, -10, 103.3, 3.642.3, 4.644.3, 2.641.3, 5.6425. 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 mean score is5.15.04.94.826 out of 25Time is Up!
