28/03/2020 Statistics(Senior Class Maths Study by Topics) 28/03/2020 0Comments by Gate Academy Welcome to your Statistics(Senior Class Maths Study by Topics) NAME EMAIL PHONE NUMBER 1. The table below shows the marks obtained by 8 students taking English and PhysicsCalculate the mean for Physics 11 57.5 32.5 12 2. The diagram illustrates the distribution of marks in a class testThe total number of students who sat for the test is 40 36 35 48 3. The following table shows the grouped data, in classes, for the heights of 50 people. height (in cm) - classes frequency 120 <- 130 2 130 <- 140 5 140 <- 150 25 150 <- 160 10 160 <- 170 8 Calculate the mean of the salaries of the 20 people. 148.4 87.4 129.4 170 4. Find the range and interquartile range, respectively, of the following data5, 7, 2, 8, 9, 5, 7, 7, 10, 3, 6, 6 5, 2 5, 3 8, 5 8, 3 5. 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 is 93° 180° 120° 24° 6. The scores of a group of students are4, 5, 6, 7, 8.The standard deviation is 3 1.4 2 1.7 7. 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 is N25,000 N20,000 N16,000 N17,500 8. Class 1-3 4-6 7-9Frequency 5 8 5The standard deviation of the frequency distribution in the table above is 2.2 5 2.5 1 9. The table below shows the frequency distribution of a number of pets in 25 houses Find the mode of the distribution 3 2 4 5 10. The marks scored by students in a test are recorded in the table belowCalculate semi interquartile range 1 0 3 2 11. 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 2 9 8 7 12. The table below shows the heights to the nearest cm of a group of peopleCalculate an estimate of the mean 25.5 cm 59.5 cm 10.3 cm 151.5 cm 13. Find the mean and mean deviation, respectively of the following 16, 18, 12, 14, 20, 25, 13, 15, 11 14. The following marks were obtained by candidates in an examination Calculate the median 45.7 12.9 54.6 10.8 15. 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° 36° 24° 45° 16. 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 is 15 25 17 20 17. 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 1.3 kg 1.2 kg 1.5 kg 1.6 kg 18. The table below shows the heights to the nearest cm of a group of peopleCalculate an estimate of the standard deviation 4.3 cm 23 cm 6.7 cm 11.2 cm 19. The following are measures of central tendency except mean deviation mean median mode 20. 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 yrs 35 yrs 46 yrs 42 yrs 21. 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, respectively 3 and 11.7 3 and 1.7 2.3 and 5 0.4 and 3 22. The table below shows the marks obtained by 8 students taking English and PhysicsThe standard deviation for Physics is 24 21 19.8 12 23. 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? 14% 15% 13% 12% 24. Find the mean and mean deviation, respectively of the following 5, -3, 6, -2, 4, -8, 4, 7, -10, 10 2.3, 4.64 3.3, 3.64 1.3, 5.64 4.3, 2.64 25. The mean of the prime number 1 and 20 is 77/8. When another prime number is added, the mean becomes 40/3 find the new prime number 23 31 33 43 1 out of 25 Time is Up! Time's up