Math topic中文

Mean grouped

calculation of the mean for grouped data

Practice questions

  1. 1Mr. Garcia asked the members of his health class how many days last week they exercised for at least 30 minutes. The res…
  2. 2A survey was carried out to find out the number of emails received in a week by each of a group of students. The table b…
  3. 3The cumulative frequency curve shows the marks obtained by the 120 students in a recent Mathematics Test. The maximum ma…
  4. 4The waiting time, t in minutes, for 40 customers at two phone service shops, Shop A and Shop B, are as follows. Calculat…
  5. 5John conducted a survey on the average time spent reading per week. This survey was carried out outside Woodlands Region…
  6. 6The table below shows the amount of time spent playing online games by a group of children in one particular week. Calcu…
  7. 7The table shows the height of 100 men who were at the health center. Find the estimated mean height of the men. Answer _…
  8. 8The frequency table shows the reaction time, t seconds, for a chemical to change the colour of the litmus paper in 100 l…
  9. 9A researcher wants to conduct a study to find out if there is a correlation between the analytical skills of adults with…
  10. 10A manufacturing company produces electronic components for various devices. They are analyzing the production data for t…
  11. 11The table below shows the number of books read by 50 students in Class A in semester 1. Calculate an estimate for the me…
  12. 12The table below summarises the times taken by female participants to complete a 10 km race. Given that the estimated mea…
  13. 13The masses of 40 oranges were measured. The cumulative frequency curve below shows the distribution of the masses. Use t…
  14. 14A group of 50 patients had their blood pressure taken. The results are shown in the table below. State the median class…
  15. 15The distances travelled per litre of petrol of 50 cars manufactured in Factory X are shown in the table below. Calculate…
  16. 16The histogram below shows the distribution of the scores of the participants from Potong Pasir Secondary School in a cur…
  17. 17The table shows the distribution of the weights of 40 students. Find the value of a. Answer a = ... Calculate an estimat…
  18. 18The number of customers, cc, served in a day at a counter for 40 days are given below. Calculate the mean number of cus…