Thirty women were examined in a hospital by a doctor and the number of heart beats per minute recorded and summarised as follows. Find the mean heart beats per minute for these women, choosing a suitable method. No. of heat     65-68   68-71   71-74   74-77   77-80   80-83   83-86 beats (per min.) No. of women:  2           4          3           8         7            4          2

Thirty women were examined in a hospital by a doctor and the number of heart beats per minute were recorded and summarised as follows.Find the mean heart beats per minute for these women,choosing a suitable method.

Thirty women were examined in a hospital by a doctor and the number of heat beats per minute were recorded and summarised as follows: Find number of women have heart bean lessthan 80 and more than 71

The number of students absent in a class were recorded every day for 120 days and the information is given in the following frequency table: No. of students absent (x) : 0 1 2 3 4 5 6 7 No. of days (f) : 1 4 10 50 34 15 4 2 Find the mean number of students absent per day.

Students of a class were tested to find their pulse rate. The following figures were obtained for the number of beats per minute. 70, 60, 70, 68, 67, 62, 71, 71, 59, 73, 73, 60, 60, 62, 6, 68, 70, 70, 74, 69 How many students are there whose pulse rate is more than 60 per minute ?

The following table production yield in kg per hectare of wheat of 150 farms in a village . Culculate the mean , median and mode of the production yeild. {:("Production Yield (kg per hectare)",50-53,53-56,56-59,59-62,62-65,65-68,68-71,71-74,74-77),("Number of Farms"," "3," "8," "14," "30," "36," "28," " 16," "10," "5):}

Study the following information carefully and answer the given questions : A word and number arrangement machine when given an input line of words and numbers rearranges them following a particular rule in each step. The following is an illustration of rearrangement Input :day 74 night 36 25 68 all for Step I : all day 74 night 36 25 68 84 Step II : all 74 day night 36 25 68 Step III : all 74 day 68 night 36 25 for Step IV : all 74 day 68 for night 36 35 Step V : all 74 day 68 for 36 night 25 and Step V is the last step of the rearrangement of the above input As per the rules followed in the above steps, find out in the following questions the appropriate step for the given input. Input : war 52 and peace 43 16 now 24 How many steps will be required to complete the rearrangement ? 1) Four 2) Five 3) Six 4) Seven 5) None of these