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Mice21 [21]
3 years ago
8

Which of the following choices is the standard deviation of the sample shown here

Mathematics
2 answers:
sp2606 [1]3 years ago
8 0

Answer:

(D)

Step-by-step explanation:

The given data set is:

18, 19, 20, 21, 22

Mean of the given data set is given as:

Mean=\frac{18+19+20+21+22}{5}

Mean=\frac{100}{5}

Mean=20

Now,

Data values                                              (x-{\overline{x})^2

18                                                                              4

19                                                                              1

20                                                                             0

21                                                                              1

22                                                                             4

Now, variance is given as:

V=\frac{4+1+0+1+4}{5}

V=2

The standard deviation is the square root of the variance, thus

SD=\sqrt{V}

SD=\sqrt{2}

Thus, option (D) is correct.

Vladimir79 [104]3 years ago
4 0
2.5 would be the answer
 
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