Question

Pranalee was practising for a 100 m running race. She ran 100 m distance 20 times. The time required, in seconds, for each attempt was as follows.18 , 17 , 17 , 16 , 15 , 16 , 15 , 14 , 16 , 15 , 15 , 17 , 15 , 16 , 15 , 17 , 16 , 15 , 14 , 15
Find the mean of the times taken for running.

Answer 1

Answer:

the mean of the times taken for running. = 15.7 sec

Step-by-step explanation:

Pranalee was practising for a 100 m running race. She ran 100 m distance 20 times. The time required, in seconds, for each attempt was as follows.18 , 17 , 17 , 16 , 15 , 16 , 15 , 14 , 16 , 15 , 15 , 17 , 15 , 16 , 15 , 17 , 16 , 15 , 14 , 15  

Find the mean of the times taken for running.

Total number of Data = 20

Sum of times =  18 + 17 + 17 + 16 + 15 + 16 + 15 + 14 + 16 + 15 + 15 + 17 + 15 + 16 + 15 + 17 + 16 + 15 + 14 + 15

Sum = 314

Mean = Sum of all data / numbers of dat

=> Mean = 314/20 =  15.7

the mean of the times taken for running. = 15.7 sec

Answer 2

Answer:

The mean of the times taken for running. = 15.7 sec

Step-by-step Explanation:

Pranalee was practicing for a 100 m running race. She ran a distance of 100 m, 20 times.  The time required for each attempt in seconds is as follows:

18 , 17 , 17 , 16 , 15 , 16 , 15 , 14 , 16 , 15 , 15 , 17 , 15 , 16 , 15 , 17 , 16 , 15 , 14 , 15  

Now we need to find the mean of the times taken for running.

Total number of Data = 20

Sum of times =  18 + 17 + 17 + 16 + 15 + 16 + 15 + 14 + 16 + 15 + 15 + 17 + 15 + 16 + 15 + 17 + 16 + 15 + 14 + 15

Sum = 314

Mean = Sum of all Data / Number of data  

Mean =    314 / 20 =  15.7

The mean of the times taken for running = 15.7 sec