Is there a significant difference in "mean miles/gallon" between cars that weigh 2000-2500 pounds and cars that weigh 2501-3000 pounds?

Please include Means Descriptive Stats - Discuss Data outliers, include table (mean, std dev, Q1, Q3, fences,etc.; Charts -- frequency distribution, etc; Means Inferential Stats -Hypotheses; Critical Values (Why and how selected?); Test Statistics (requirements, both methods); Test Conclusion (test statistics v. critical values); Interpretation Statement (see textbook format); Confidence Intervals

Manufacturer	Origin	Model	Type	Passengers	Price	Price_Category	CityMPG	CityMPG_Category	HighwayMPG	HighwayMPG_Category	EngineSize	Enginesize_Category	Horsepower	Horsepower_Category	FuelTank	Weight	Weight_Category	Mean Miles Per Gallon
Mazda	non-US	RX-7	Sporty	2	32.5	Expensive	17	Poor	25	Poor	1.3	Small	255	>=200	20	2895	< 1.5 Ton	21
Chevrolet	US	Corvette	Sporty	2	38	Expensive	17	Poor	25	Poor	5.7	Large	300	>=200	20	3380	> 1.5 Ton	21
Hyundai	non-US	Scoupe	Sporty	4	10	Cheap	26	Good	34	Good	1.5	Small	92	<100	11.9	2285	< 1.5 Ton	30
Honda	non-US	Prelude	Sporty	4	19.8	Moderate	24	Good	31	Good	2.3	Medium	160	150 to <200	15.9	2865	< 1.5 Ton	27.5
Honda	non-US	Accord	Compact	4	17.5	Moderate	24	Good	31	Good	2.2	Medium	140	100 to <150	17	3040	> 1.5 Ton	27.5
Honda	non-US	Civic	Small	4	12.1	Cheap	42	Good	46	Good	1.5	Small	102	100 to <150	11.9	2350	< 1.5 Ton	44
Geo	non-US	Storm	Sporty	4	12.5	Cheap	30	Good	36	Good	1.6	Small	90	<100	12.4	2475	< 1.5 Ton	33
Ford	US	Festiva	Small	4	7.4	Cheap	31	Good	33	Good	1.3	Small	63	<100	10	1845	< 1.5 Ton	32
Dodge	US	Stealth	Sporty	4	25.8	Expensive	18	Poor	24	Poor	3	Large	300	>=200	19.8	3805	> 1.5 Ton	21
Ford	US	Mustang	Sporty	4	15.9	Moderate	22	Good	29	Poor	2.3	Medium	105	100 to <150	15.4	2850	< 1.5 Ton	25.5
Geo	non-US	Metro	Small	4	8.4	Cheap	46	Good	50	Good	1	Small	55	<100	10.6	1695	< 1.5 Ton	48
Ford	US	Probe	Sporty	4	14	Cheap	24	Good	30	Good	2	Medium	115	100 to <150	15.5	2710	< 1.5 Ton	27
Suzuki	non-US	Swift	Small	4	8.6	Cheap	39	Good	43	Good	1.3	Small	70	<100	10.6	1965	< 1.5 Ton	41
Subaru	non-US	Justy	Small	4	8.4	Cheap	33	Good	37	Good	1.2	Small	73	<100	9.2	2045	< 1.5 Ton	35
Toyota	non-US	Celica	Sporty	4	18.4	Moderate	25	Good	32	Good	2.2	Medium	135	100 to <150	15.9	2950	< 1.5 Ton	28.5
Volkswagen	non-US	Corrado	Sporty	4	23.3	Expensive	18	Poor	25	Poor	2.8	Medium	178	150 to <200	18.5	2810	< 1.5 Ton	21.5
Volkswagen	non-US	Fox	Small	4	9.1	Cheap	25	Good	33	Good	1.8	Small	81	<100	12.4	2240	< 1.5 Ton	29
Pontiac	US	Firebird	Sporty	4	17.7	Moderate	19	Poor	28	Poor	3.4	Large	160	150 to <200	15.5	3240	> 1.5 Ton	23.5
Mazda	non-US	323	Small	4	8.3	Cheap	29	Good	37	Good	1.6	Small	82	<100	13.2	2325	< 1.5 Ton	33
Lexus	non-US	SC300	Midsize	4	35.2	Expensive	18	Poor	23	Poor	3	Large	225	>=200	20.6	3515	> 1.5 Ton	20.5
Mercury	US	Capri	Sporty	4	14.1	Cheap	23	Good	26	Poor	1.6	Small	100	100 to <150	11.1	2450	< 1.5 Ton	24.5
Pontiac	US	LeMans	Small	4	9	Cheap	31	Good	41	Good	1.6	Small	74	<100	13.2	2350	< 1.5 Ton	36
Plymouth	US	Laser	Sporty	4	14.4	Cheap	23	Good	30	Good	1.8	Small	92	<100	15.9	2640	< 1.5 Ton	26.5
BMW	non-US	535i	Midsize	4	30	Expensive	22	Good	30	Good	3.5	Large	208	>=200	21.1	3640	> 1.5 Ton	26
Chevrolet	US	Camaro	Sporty	4	15.1	Moderate	19	Poor	28	Poor	3.4	Large	160	150 to <200	15.5	3240	> 1.5 Ton	23.5
Nissan	non-US	Sentra	Small	5	11.8	Cheap	29	Good	33	Good	1.6	Small	110	100 to <150	13.2	2545	< 1.5 Ton	31
Nissan	non-US	Altima	Compact	5	15.7	Moderate	24	Good	30	Good	2.4	Medium	150	150 to <200	15.9	3050	> 1.5 Ton	27
Oldsmobile	US	Cutlass_Ci	Midsize	5	16.3	Moderate	23	Good	31	Good	2.2	Medium	110	100 to <150	16.5	2890	< 1.5 Ton	27
Oldsmobile	US	Achieva	Compact	5	13.5	Cheap	24	Good	31	Good	2.3	Medium	155	150 to <200	15.2	2910	< 1.5 Ton	27.5
Nissan	non-US	Maxima	Midsize	5	21.5	Expensive	21	Good	26	Poor	3	Large	160	150 to <200	18.5	3200	> 1.5 Ton	23.5
Mitsubishi	non-US	Diamante	Midsize	5	26.1	Expensive	18	Poor	24	Poor	3	Large	202	>=200	19	3730	> 1.5 Ton	21
Mazda	non-US	626	Compact	5	16.5	Moderate	26	Good	34	Good	2.5	Medium	164	150 to <200	15.5	2970	< 1.5 Ton	30
Mazda	non-US	Protege	Small	5	11.6	Cheap	28	Good	36	Good	1.8	Small	103	100 to <150	14.5	2440	< 1.5 Ton	32
Cadillac	US	Seville	Midsize	5	40.1	Expensive	16	Poor	25	Poor	4.6	Large	295	>=200	20	3935	> 1.5 Ton	20.5
Mercedes-Benz	non-US	190E	Compact	5	31.9	Expensive	20	Poor	29	Poor	2.3	Medium	130	100 to <150	14.5	2920	< 1.5 Ton	24.5
Mitsubishi	non-US	Mirage	Small	5	10.3	Cheap	29	Good	33	Good	1.5	Small	92	<100	13.2	2295	< 1.5 Ton	31
Mercury	US	Cougar	Midsize	5	14.9	Cheap	19	Poor	26	Poor	3.8	Large	140	100 to <150	18	3610	> 1.5 Ton	22.5
Buick	US	Riviera	Midsize	5	26.3	Expensive	19	Poor	27	Poor	3.8	Large	170	150 to <200	18.8	3495	> 1.5 Ton	23
Acura	non-US	Legend	Midsize	5	33.9	Expensive	18	Poor	25	Poor	3.2	Large	200	>=200	18	3560	> 1.5 Ton	21.5
Toyota	non-US	Camry	Midsize	5	18.2	Moderate	22	Good	29	Poor	2.2	Medium	130	100 to <150	18.5	3030	> 1.5 Ton	25.5
Audi	non-US	90	Compact	5	29.1	Expensive	20	Poor	26	Poor	2.8	Medium	172	150 to <200	16.9	3375	> 1.5 Ton	23
Volkswagen	non-US	Passat	Compact	5	20	Expensive	21	Good	30	Good	2	Medium	134	100 to <150	18.5	2985	< 1.5 Ton	25.5
Volvo	non-US	850	Midsize	5	26.7	Expensive	20	Poor	28	Poor	2.4	Medium	168	150 to <200	19.3	3245	> 1.5 Ton	24
Volvo	non-US	240	Compact	5	22.7	Expensive	21	Good	28	Poor	2.3	Medium	114	100 to <150	15.8	2985	< 1.5 Ton	24.5
Acura	non-US	Integra	Small	5	15.9	Moderate	25	Good	31	Good	1.8	Small	140	100 to <150	13.2	2705	< 1.5 Ton	28
Saab	non-US	900	Compact	5	28.7	Expensive	20	Poor	26	Poor	2.1	Medium	140	100 to <150	18	2775	< 1.5 Ton	23
Pontiac	US	Grand_Prix	Midsize	5	18.5	Moderate	19	Poor	27	Poor	3.4	Large	200	>=200	16.5	3450	> 1.5 Ton	23
Pontiac	US	Sunbird	Compact	5	11.1	Cheap	23	Good	31	Good	2	Medium	110	100 to <150	15.2	2575	< 1.5 Ton	27
Saturn	US	SL	Small	5	11.1	Cheap	28	Good	38	Good	1.9	Small	85	<100	12.8	2495	< 1.5 Ton	33
Toyota	non-US	Tercel	Small	5	9.8	Cheap	32	Good	37	Good	1.5	Small	82	<100	11.9	2055	< 1.5 Ton	34.5
Subaru	non-US	Legacy	Compact	5	19.5	Moderate	23	Good	30	Good	2.2	Medium	130	100 to <150	15.9	3085	> 1.5 Ton	26.5
Subaru	non-US	Loyale	Small	5	10.9	Cheap	25	Good	30	Good	1.8	Small	90	<100	15.9	2490	< 1.5 Ton	27.5
Hyundai	non-US	Excel	Small	5	8	Cheap	29	Good	33	Good	1.5	Small	81	<100	11.9	2345	< 1.5 Ton	31
Hyundai	non-US	Elantra	Small	5	10	Cheap	22	Good	29	Poor	1.8	Small	124	100 to <150	13.7	2620	< 1.5 Ton	25.5
Chevrolet	US	Corsica	Compact	5	11.4	Cheap	25	Good	34	Good	2.2	Medium	110	100 to <150	15.6	2785	< 1.5 Ton	29.5
Eagle	US	Summit	Small	5	12.2	Cheap	29	Good	33	Good	1.5	Small	92	<100	13.2	2295	< 1.5 Ton	31
Ford	US	Taurus	Midsize	5	20.2	Expensive	21	Good	30	Good	3	Large	140	100 to <150	16	3325	> 1.5 Ton	25.5
Ford	US	Tempo	Compact	5	11.3	Cheap	22	Good	27	Poor	2.3	Medium	96	<100	15.9	2690	< 1.5 Ton	24.5
Ford	US	Escort	Small	5	10.1	Cheap	23	Good	30	Good	1.8	Small	127	100 to <150	13.2	2530	< 1.5 Ton	26.5
Hyundai	non-US	Sonata	Midsize	5	13.9	Cheap	20	Poor	27	Poor	2	Medium	128	100 to <150	17.2	2885	< 1.5 Ton	23.5
Dodge	US	Shadow	Small	5	11.3	Cheap	23	Good	29	Poor	2.2	Medium	93	<100	14	2670	< 1.5 Ton	26
Chevrolet	US	Cavalier	Compact	5	13.4	Cheap	25	Good	36	Good	2.2	Medium	110	100 to <150	15.2	2490	< 1.5 Ton	30.5
Dodge	US	Colt	Small	5	9.2	Cheap	29	Good	33	Good	1.5	Small	92	<100	13.2	2270	< 1.5 Ton	31
Infiniti	non-US	Q45	Midsize	5	47.9	Expensive	17	Poor	22	Poor	4.5	Large	278	>=200	22.5	4000	> 1.5 Ton	19.5
Lexus	non-US	ES300	Midsize	5	28	Expensive	18	Poor	24	Poor	3	Large	185	150 to <200	18.5	3510	> 1.5 Ton	21
Chrysler	US	LeBaron	Compact	6	15.8	Moderate	23	Good	28	Poor	3	Large	141	100 to <150	16	3085	> 1.5 Ton	25.5
Pontiac	US	Bonneville	Large	6	24.4	Expensive	19	Poor	28	Poor	3.8	Large	170	150 to <200	18	3495	> 1.5 Ton	23.5
Chrylser	US	Concorde	Large	6	18.4	Moderate	20	Poor	28	Poor	3.3	Large	153	150 to <200	18	3515	> 1.5 Ton	24
Dodge	US	Spirit	Compact	6	13.3	Cheap	22	Good	27	Poor	2.5	Medium	100	100 to <150	16	2970	< 1.5 Ton	24.5
Eagle	US	Vision	Large	6	19.3	Moderate	20	Poor	28	Poor	3.5	Large	214	>=200	18	3490	> 1.5 Ton	24
Dodge	US	Dynasty	Midsize	6	15.6	Moderate	21	Good	27	Poor	2.5	Medium	100	100 to <150	16	3080	> 1.5 Ton	24
Audi	non-US	100	Midsize	6	37.7	Expensive	19	Poor	26	Poor	2.8	Medium	172	150 to <200	21.1	3405	> 1.5 Ton	22.5
Chrysler	US	Imperial	Large	6	29.5	Expensive	20	Poor	26	Poor	3.3	Large	147	100 to <150	16	3570	> 1.5 Ton	23
Buick	US	Century	Midsize	6	15.7	Moderate	22	Good	31	Good	2.2	Medium	110	100 to <150	16.4	2880	< 1.5 Ton	26.5
Chevrolet	US	Caprice	Large	6	18.8	Moderate	17	Poor	26	Poor	5	Large	170	150 to <200	23	3910	> 1.5 Ton	21.5
Lincoln	US	Continenta	Midsize	6	34.3	Expensive	17	Poor	26	Poor	3.8	Large	160	150 to <200	18.4	3695	> 1.5 Ton	21.5
Cadillac	US	DeVille	Large	6	34.7	Expensive	16	Poor	25	Poor	4.9	Large	200	>=200	18	3620	> 1.5 Ton	20.5
Chevrolet	US	Lumina	Midsize	6	15.9	Moderate	21	Good	29	Poor	2.2	Medium	110	100 to <150	16.5	3195	> 1.5 Ton	25
Oldsmobile	US	Eighty-Eig	Large	6	20.7	Expensive	19	Poor	28	Poor	3.8	Large	170	150 to <200	18	3470	> 1.5 Ton	23.5
Ford	US	Crown_Vict	Large	6	20.9	Expensive	18	Poor	26	Poor	4.6	Large	190	150 to <200	20	3950	> 1.5 Ton	22
Buick	US	LeSabre	Large	6	20.8	Expensive	19	Poor	28	Poor	3.8	Large	170	150 to <200	18	3470	> 1.5 Ton	23.5
Buick	US	Roadmaster	Large	6	23.7	Expensive	16	Poor	25	Poor	5.7	Large	180	150 to <200	23	4105	> 1.5 Ton	20.5
Lincoln	US	Town_Car	Large	6	36.1	Expensive	18	Poor	26	Poor	4.6	Large	210	>=200	20	4055	> 1.5 Ton	22
Volkswagen	non-US	Eurovan	Van	7	19.7	Moderate	17	Poor	21	Poor	2.5	Medium	109	100 to <150	21.1	3960	> 1.5 Ton	19
Dodge	US	Caravan	Van	7	19	Moderate	17	Poor	21	Poor	3	Large	142	100 to <150	20	3705	> 1.5 Ton	19
Mazda	non-US	MPV	Van	7	19.1	Moderate	18	Poor	24	Poor	3	Large	155	150 to <200	19.6	3735	> 1.5 Ton	21
Oldsmobile	US	Silhouette	Van	7	19.5	Moderate	18	Poor	23	Poor	3.8	Large	170	150 to <200	20	3715	> 1.5 Ton	20.5
Ford	US	Aerostar	Van	7	19.9	Moderate	15	Poor	20	Poor	3	Large	145	100 to <150	21	3735	> 1.5 Ton	17.5
Chevrolet	US	Lumina_APV	Van	7	16.3	Moderate	18	Poor	23	Poor	3.8	Large	170	150 to <200	20	3715	> 1.5 Ton	20.5
Toyota	non-US	Previa	Van	7	22.7	Expensive	18	Poor	22	Poor	2.4	Medium	138	100 to <150	19.8	3785	> 1.5 Ton	20
Nissan	non-US	Quest	Van	7	19.1	Moderate	17	Poor	23	Poor	3	Large	151	150 to <200	20	4100	> 1.5 Ton	20
Chevrolet	US	Astro	Van	8	16.6	Moderate	15	Poor	20	Poor	4.3	Large	165	150 to <200	27	4025	> 1.5 Ton	17.5
										correlation coefficient (r ) =	0.733198