Question

What is the sample size for the untreated and treated Gasoline Columns and how to find it.

Trial #	Vehicle Make / Model	Untreated Gasoline	Treated Gasoline
1	Acura MDX	20.724	22.461
2	Acura ILX	29.263	29.635
3	Buick Encore	28.733	32.064
4	Buick Regal	22.191	23.390
5	Chevy Camaro	14.283	15.327
6	Chevy Cruz	31.680	33.493
7	Chevy Equinox	24.552	25.522
8	Chrysler 300	21.417	23.687
9	Dodge Durango	17.721	18.949
10	Ford Focus	28.712	29.011
11	Ford Expedition	18.159	19.239
12	Ford Escape	23.118	25.350
13	Honda Civic	33.101	34.679
14	Honda Pilot	21.117	22.540
15	Hyundai Accent	33.382	31.783
16	Hyundai Santa Fe	21.087	24.103
17	Infiniti Q50	11.510	11.131
18	Jeep Cherokee	23.947	23.703
19	Jeep Wrangler	17.245	18.190
20	Kia Forte	29.405	29.597
21	Kia Sedona	18.996	21.679
22	Lexus ES 350	23.441	25.435
23	Lexus EX 570	15.748	15.811
24	Lincoln Continental	21.996	22.070
25	Mazda 2	33.264	35.202
26	Maxda CX-9	22.915	23.365
27	Nissan Altima	29.876	30.813
28	Nissan Murano	24.564	23.196
29	Subaru Forester	26.367	26.827
30	Toyota Yaris	35.725	35.681
31	Toyota Sequoia	16.234	16.708
32	Volkswagon Atlas	18.007	18.205
33	Volkswagon Beetle	28.773	30.980

Answer 1

As we can see that there are 33 samples for both untreated and treated Gasoline.

Sample Size will be 33 for both untreated and treated Gasoline.

Please let me know in case we have to perform any t test.

THANKS

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