Question

Find the mean of the following data:
xi 11 12 13 14 15 16 17 18
fi 10 1 3 4 8 10 3 and 1 step by step​

Answer 1

Answer:

$13.9$

Step-by-step explanation:

$xifi \: 110 \\ 12 \\ 39 \\ 56 \\ 120 \\ 160 \\ 51 \\ 18$

€xifi=566 €fi=40

mean=€xifi/€fi

=556/40

= 13.9

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Answer 2

Answer:

14.15

Step-by-step explanation:

Given:

$x_i$ 11 12 13 14 15 16 17 18

$f_i$ 10 1   3   4  8  10 3  1

Now, $Mean = \frac{x_1*f_1}{f_i}$

$x_i * f_i$ = (11×10) + (12×1) + (13×3) + (14×4) + (15×8) + (16×10) + (17×3) + (18×1)

         = 566

$f_i$ = 10 + 1 + 3 + 4 + 8 + 10 + 3 + 1

  = 40

Now, using these values:

$Mean = \frac{566}{40}$

$Mean = 14.15$

Therefore, the answer is 14.15

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