Question

19. The marks in science of 13 students are 31, 37, 29, 41, 35, 35, 38, 36, 35, 38, 32, 29, 43. Find the

range.

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Answer 1

Answer:

Rearranging the data into ascending order, we get

17,18,23,25,29,31,35,35,35,37,38,42

Here,

(a) Range = greatest observation − lowest observation

=42−17=25

(b) Mean = Sum of observations ÷ number of observations

=

12

17+18+23+25+29+31+35+35+35+37+38+42

=

12

365

=30.41

(c) Since the total number of observations is even

Median =

2

31+35

=

2

66

=33

(d) The mode is 35 because it occurs most frequently i.e., 3 times.

Answer 2

Sorry I can't answer

Step-by-step explanation:

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