The number of litres of petrol purchased by a random sample of motor vehicle drivers…

MATHEMATICS · Multi-part · CBSE · Mathematics · Statistics · Statistics

Problem

The number of litres of petrol purchased by a random sample of motor vehicle drivers is shown alongside. For the given data, estimate the:
Litres ( LL )Number of vehicles
15≤L<2015 \le L < 205
20≤L<2520 \le L < 2513
25≤L<3025 \le L < 3017
30≤L<3530 \le L < 3529
35≤L<4035 \le L < 4027
40≤L<4540 \le L < 4518
45≤L<5045 \le L < 507
(1) mean (2) standard deviation.

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