Question

answer fast plsss what is sum fi and sum xi in statistic​

Answer 1

Answer:

In Statistics the frequency of an event xi is the number fi of times the event occurred in the experiment or the study.The mean (or average) of observations, is the sum of the values of all the observations divided by the total number of observations. ... Solution: To find the mean marks, we require the product of each xi with the corresponding frequency fi.the ith value of variable X

the ith value of variable Xxi represents the ith value of variable X. For the data, x1 = 21, x2 = 42, and so on. ... For the data, Σxi = 21 + 42 +… + 52 = 290.

Answer 2

Step-by-step explanation:

Hope it helps to you all.