Question

Based on the following data for car crash deceleration measurements, do a 2-Way ANOVA test and determine if car size and /or country of origin make a difference in crash effects on the passenger. Use results to answer question 6 (i.e., the question that will be #6 on the test)

Car Crash Effects On Passenger (In “g”s)

      Small Medium Large Cars

Foreign 47 39 38

   45 44 40

   43 47 42

Domestic 43 43 37

   44 37 38

   42 34 33

Answer 1

Hypothesis

Ho: Car size and /or country of origin make a not difference in crash effects on the passenger.

H1: Car size and /or country of origin make a difference in crash effects on the passenger

SUMMARY	Count	Sum	Average	Variance
Foreign	3	124	41.33333	24.33333
	3	129	43	7
	3	132	44	7
Domestic	3	123	41	12
	3	119	39.66667	14.33333
	3	109	36.33333	24.33333
Small	6	264	44	3.2
Medium	6	244	40.66667	23.46667
Large	6	228	38	9.2

ANOVA

Source of Variation	SS	df	MS	F	P-value	F crit
Rows	109.7778	5	21.95556	3.15655	0.057463	3.325835
Columns	108.4444	2	54.22222	7.795527	0.009111	4.102821
Error	69.55556	10	6.955556
Total	287.7778	17

F- calculate > P- value

The Reject the null hypothesis.

conculsion:

Car size and /or country of origin make a difference in crash effects on the passenger.