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Mastering the Calculator using the Sharp EL-531LH
(b) The sample of snail foot lengths
2.2
4.1
3.4
1.6
2.5
4.3
3.3
3.1
4.7
3.8
Answers:
(a) Rainfall statistics
mean:
x
= 1 265.3 mm
standard deviation:
s = 336.4 mm (sample standard deviation)
variance:
2
s
= 113141.7 mm
(b) Snail statistics
mean:
x
= 3.4 cm
standard deviation:
s = 0.70 cm
variance:
2
2
s
= 0.49 cm
Snail foot length (cm)
3.5
4.5
3.1
3.3
3.4
3.6
3.7
4.4
3.2
2.6
2
3.2
3.7
3.8
3.1
2.9
3.3
3.2
4.1
3.9
3.0
3.0
2.6
4.7
3.7
3.9
3.1
1.9
3.4
4.2
3.5
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