Severity: Warning

Message: count(): Parameter must be an array or an object that implements Countable

Filename: controllers/formulas.php

Line Number: 37

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Sample mean = Sum of all values of x / Number of values

x?= ∑x/ n

7 14 5 0 9 7 10 4 0 8

Compute the sample mean.

Solution: - Let us denoted the value in this example by x. Then the sum of the ten values of x is

∑x=7+14+5+0+9+7+10+4+0+8

=64

Because the data set contains ten values, therefore n=10.

Substituting the values of ∑x and n in the sample mean formula, we obtain

x?= ∑x/ n

=64/10

=6.4

Thus, the sample mean=

24 32 27 23 35

Calculate the sample mean.

Solution: - Sample mean:

x?= ∑x/ n

= (24+32+27+23+35)/5

= 141 /5

= 28.2

Therefore, the sample mean=