Question

The mean of 5 observation is 8 . Find the sum of the 5 observations.​

Answer 1

Answer:

Mean = 8

(Sum of observations/No. of observations)=8

(Sum of observations/5)=8

Sum of observations=8*5

Sum of observations=40

Step-by-step explanation:

Answer 2

Answer- The above question is from the chapter 'Statistics'.

Statistics- It is a branch of Mathematics dealing with the collection and analysis of data which can be single as well as grouped.

Mean, median and mode are called 'Measures of Central Tendency'.  

Mean: Average of a given data is called mean.

Median: The middle most value of a given data is called median.

Mode: The most frequently occurring value in a given data is called mode.  

Single data is called ungrouped data.

Finding mean-

Mean = Sum of observations ÷ Number of observations

Finding median-

Median = Middle most value after arranging in ascending or descending order

Median = (n + 1)th term/2 where n= number of observations (n = odd)

Median = (1/2) × (n/2)th term + (n/2 + 1) th term where n = number of observations (n = even)

Finding mode-

Mode = Most frequently occurring value

Concept used: Mean = Sum of observations ÷ Number of observations

Given question: The mean of 5 observations is 8. Find the sum of the 5 observations.​

Solution: We know that,

Mean = Sum of observations ÷ Number of observations

8 = Sum of 5 observations ÷ 5

Sum of 5 observations = 8 × 5

Sum of 5 observations = 40

∴ Sum of 5 observations = 40