Question

Does the design of the keyboards (A,B, & C) effect typing performance? Test at .05 level of significance. Keyboard A: 0, 4, 0, 1, 0 Keyboard B: 6, 8, 5, 4, 2 Keyboard C: 6, 5, 9, 4, 6

Answer 1

The following table is obtained:

	Group 1	Group 2	Group 3
	0	6	6
	4	8	5
	0	5	9
	1	4	4
	0	2	6
Sum =	5	25	30
Average =	1	5	6
∑iXij2=\sum_i X_{ij}^2 =∑i​Xij2​=	17	145	194
St. Dev. =	1.732	2.236	1.871
SS =	12	20	14
n =	5	5	5

Conclusion

It is concluded that the null hypothesis Ho is rejected. Therefore, there is enough evidence to claim that

the design of the keyboards (A,B, & C) effect typing performance

at the α=0.05 significance level.