Sadhana Bhadoriya

Ex – 13.2 Que No. 2 Q.2) The following data gives the information on the observed lifetimes (in hours) of 225 electrical components : Determine the modal lifetimes of the components. Solution:-

Ex – 13.2 Que No. 1 Q.1) The following table shows the ages of the patients admitted in a hospital during a year: Find the mode and the mean of the data given above. Compare and interpret the two measures of central tendency. Solution:-

Ex – 13.1 Que No. 9 Q.9) The following table gives the literacy rate (in percentage) of 35 cities. Find the mean literacy rate. Solution:-

Ex – 13.1 Que No. 8 Q.8) A class teacher has the following absentee record of 40 students of a class for the whole term. Find the mean number of days a student was absent. Solution:-

Ex – 13.1 Que No. 7 Q.7) To find out the concentration of SO2 in the air (in parts per million, i.e., ppm), the data was collected for 30 localities in a certain city and is presented below: Find the mean concentration of SO2 in the air Solution:-

Ex – 13.1 Que No. 6 Q.6) The table below shows the daily expenditure on food of 25 households in a locality. Find the mean daily expenditure on food by a suitable method. Solution:-

Ex – 13.1 Que No. 5 Q.5) In a retail market, fruit vendors were selling mangoes kept in packing boxes. These boxes contained varying number of mangoes. The following was the distribution of mangoes according to the number of boxes. Find the mean number of mangoes kept in a packing box. Which method of finding

Ex – 13.1 Que No. 4 Q.4) Thirty women were examined in a hospital by a doctor and the number of heartbeats perminute were recorded and summarised as follows. Find the mean heartbeats per minutefor these women, choosing a suitable method. Solution:-

Ex – 13.1 Que No. 3 Q.3) The following distribution shows the daily pocket allowance of children of a locality. The mean pocket allowance is Rs 18. Find the missing frequency f. Solution:-

Ex – 13.1 Que No. 2 Q.2) Consider the following distribution of daily wages of 50 workers of a factory. Find the mean daily wages of the workers of the factory by using an appropriate method. Solution:-