Question

The top speeds (in mph) for a sample of five new automobile brands are listed below. Calculate the standard deviation of the speeds. 150, 135, 195, 185, 115.

Statistics.

Answer 1

Answer

The top speeds (in mph) for a sample of five new automobile brands are listed below.

topspeed(x)	XBAR	X-XBAR	(X-XBAR)^2
150	156	-6	36
195	156	-21	441
195	156	39	1521
185	156	29	841
115	156	-41	1681
780	156	-41	1681
mean=780/5
mean=156
		STANDARD DEVIATION=SQRT(4520/5)
		=SQRT(4520/4)
		=SQRT(1130)
		33.61547
		Sample standard deviation=33.6

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