Question

1. The service departments at Tionesta Ford Lincoln Mercury and Sheffield Motors Inc., two of the four Applewood Auto Group dealerships, were both open 24 working days last month. Listed below is the number of vehicles serviced last month at the two dealerships. Construct dot plots and report summary statistics to compare the two dealerships. Tionesta Ford Lincoln Mercury Friday Saturday Thursday Wednesday Tuesday Monday 26 28 39 27 33 23 35 32 33 28 32 30 32 27 31 36 25 29 36 30 37 35 32 35 Sheffield Motors Inc. Thursday Friday Saturday Wednesday Tuesday Monday 37 34 36 44 35 31 40 31 31 43 37 30 36 43 34 36 32 44 33 42 30 37 38 26

Answer 1

Ans.

Tionesta Ford Lincoin Mercury 45 40 35 30 25 20 15 10 5 0 0 1 2 6 7 Ser ies3 Ser ies4 Series1 Series2 n un

Sheffield Motors Inc. 50 45 40 35 30 20 15 10 0 1 4 6 7 Ser ies3 Ser ies4 Ser ies1 Ser ies2 LD 25 Ln

summary Statistics:

1)

1		2		3		4
Mean	29.33333333	Mean	31.66666667	Mean	30	Mean	34.16666667
Standard Error	2.347575582	Standard Error	0.988826465	Standard Error	1.591644852	Standard Error	1.077548658
Median	27.5	Median	32	Median	30	Median	35
Mode	#N/A	Mode	32	Mode	#N/A	Mode	35
Standard Deviation	5.750362307	Standard Deviation	2.422120283	Standard Deviation	3.898717738	Standard Deviation	2.639444386
Sample Variance	33.06666667	Sample Variance	5.866666667	Sample Variance	15.2	Sample Variance	6.966666667
Kurtosis	0.5859375	Kurtosis	0.158832645	Kurtosis	-0.129847645	Kurtosis	-0.478697832
Skewness	1.01992171	Skewness	-0.304954452	Skewness	0.364492309	Skewness	-0.855624471
Range	16	Range	7	Range	11	Range	7
Minimum	23	Minimum	28	Minimum	25	Minimum	30
Maximum	39	Maximum	35	Maximum	36	Maximum	37
Sum	176	Sum	190	Sum	180	Sum	205
Count	6	Count	6	Count	6	Count	6

2)

1		2		3		4
Mean	36.16666667	Mean	35.33333333	Mean	37.5	Mean	34.33333333
Standard Error	1.77795138	Standard Error	2.231093404	Standard Error	1.995828984	Standard Error	2.375803957
Median	35.5	Median	34	Median	36	Median	35
Mode	#N/A	Mode	31	Mode	36	Mode	#N/A
Standard Deviation	4.355073669	Standard Deviation	5.465040409	Standard Deviation	4.888762625	Standard Deviation	5.819507425
Sample Variance	18.96666667	Sample Variance	29.86666667	Sample Variance	23.9	Sample Variance	33.86666667
Kurtosis	2.510648287	Kurtosis	-1.972307478	Kurtosis	-1.623395949	Kurtosis	-0.83990793
Skewness	1.204178993	Skewness	0.44560839	Skewness	0.577706058	Skewness	-0.218515666
Range	13	Range	13	Range	12	Range	16
Minimum	31	Minimum	30	Minimum	32	Minimum	26
Maximum	44	Maximum	43	Maximum	44	Maximum	42
Sum	217	Sum	212	Sum	225	Sum	206
Count	6	Count	6	Count	6	Count	6