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NeTakaya
2 years ago
8

Marks of 12 students in a unit test are given as 4, 21, 13, 17, 5, 9, 10, 20, 19, 12, 20, 14. Assume a mean and calculate the ar

ithmetic mean of the data. Assume another number as mean and calculate the arithmetic mean again. Do you get the same result? Comment​
Mathematics
2 answers:
riadik2000 [5.3K]2 years ago
5 0

hope this helps you...

.....

Sidana [21]2 years ago
3 0
<h2>mean = 13.67</h2>

<u>Step-by-step explanation:</u>

<h3><u>o</u><u>b</u><u>s</u><u>e</u><u>r</u><u>v</u><u>a</u><u>t</u><u>i</u><u>o</u><u>n</u><u>s</u><u> </u>= 4, 21, 13, 17, 5, 9, 10, 20, 19, 12, 20, 14</h3>

<h2>mean = sum of observations ÷ numbers of observations</h2><h2>...........................................</h2><h3>sum of observation = 4+21+13+17+5+9+10+20+19+12+20+14</h3><h3>= <u>164</u></h3>

<h3><u>n</u><u>u</u><u>m</u><u>b</u><u>e</u><u>r</u><u>s</u> of observation = 12</h3>

<h2>mean = 164 ÷ 12</h2><h2> = 13.67</h2>
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