Centurion

Ah! The Wilcoxon signed ranks test.
For the n-matched pairs, it looks like you test using alpha = 0.05. Judging by this:

Null: R&T mean <= C&D mean/rejected at only 0.09 level. Thus, accept R&T mean > C&D mean with caution.
Null: MT mean <= R&T mean/rejected at the 0.05 level. Thus, accept MT mean > R&T mean.
Null: MT mean <= C&D mean/rejected at the 0.0016 level. Thus, accept MT mean > C&D mean.

Null: C&D mean <= R&T mean/P = 0.30. Thus, can't conclude C&D mean > R&T mean.
Null: MT mean not = R&T mean/P = 1.0. Thus, conclude MT mean = R&T mean.
Null: C&D mean <= MT mean/p = 0.27. Thus, can't conclude C&D mean > MT mean.

I think C&D may be our optimist this time around.

znod

I think C&D may be our optimist this time around.
[/quote]I had 21 pairs so I used t-tests; yep alpha = .05. And, yes, C&D looks like the optimist so far. I might go back and try Wilcoxon; the data are ready to go so why not? I'll post back when I get around to it. Lata gata.

Centurion

I had 21 pairs so I used t-tests; yep alpha = .05. And, yes, C&D looks like the optimist so far. I might go back and try Wilcoxon; the data are ready to go so why not? I'll post back when I get around to it. Lata gata.
[/quote]
Cool!

znod

I had 21 pairs so I used t-tests; yep alpha = .05. And, yes, C&D looks like the optimist so far. I might go back and try Wilcoxon; the data are ready to go so why not? I'll post back when I get around to it. Lata gata.
[/quote]
Cool!
[/quote]
Oops, don't usually use Excel for tests. Apparently, it does not include the sign or signed-ranks tests.

znod

Below is an updated data base for assessing the capabilities of the M5 and other cars on straight-line performance--my personal favorite. I have a new VTech and have made one 0 to 60 run in my 2002 Z06 using it, and I am confident I can do better. If you are interested in my VTech data on both my 545i and my Z06, then check out my "Very Preliminary Results--V-Tech" thread in the "Parts, Accessories, and Mods" discussion. I included my car in the data base under vnod's ..... I sorted the data base first by 0 to 60 time and second by 1/4 mile time so my car would end up in the array meaningfully. Except for the McLaren F1 (an interesting benchmark), I included only Manufacturers' cars that have at least one recorded 1/4 mile pass faster than 13.00 in one of the big three US auto magazines. Given my bias, I included results for the 2002 to 2004 Z06's. My 0 to 60 may be suspect since I am using a G-meter (but, I know my pitch value and other settings are appropriate--from data I have gathered). In this regard, I threw in the best 2002 to 2004 Z06 drag-strip results I know of for bone stock cars on street tires. Enjoy.

Headings--Car/Magazine/Test Date/0 to 60/1/4 Time/1/4 Speed

Ferrari Enzo R&T 7/03 3.30 11.10 133.00
Ferrari Enzo C&D 7/03 3.30 11.20 136.00
Ford GT C&D 1/04 3.30 11.60
Ferrari Enzo MT 10/04 3.40 11.00 133.90
McLaren F1 R&T 12/97 3.40 11.60 125.00
Chevrolet Corvette C6 Z06 C&D 12/05 3.40 11.80 125.00
Porsche 911 Carerra GT C&D 6/04 3.50 11.20 132.00
Chevrolet Corvette C6 Z06 MT 11/05 3.50 11.50 127.10
Mercedes SLR5 McLaren R&T 7/05 3.50 11.50 126.10
Ferrari F430 R&T 1/05 3.50 11.70 120.10
Ferrari F430 C&D 1/05 3.50 11.70 123.00
Ferrari F430 R&T 12/05 3.50 11.70 120.10
Lamborghini Murcielago MT 6/03 3.50 11.70 122.60
Porsche 911 Carerra GT MT 10/04 3.60 11.10 133.40
Ford GT MT 6/05 3.60 11.60 126.20
Mercedes SLR5 McLaren MT 1/05 3.60 11.60 127.20
Mercedes SLR5 McLaren C&D 1/05 3.60 11.60 125.00
Ford GT R&T 12/05 3.60 11.70 125.80
Ford GT MT 1/04 3.60 11.78 124.31
Chevrolet Corvette C5 Z06--200? Drag Strip < 4.00 11.781 xxxx
Chevrolet Corvette C5 Z06--2002 Drag Strip < 4.00 11.783 116.90
Chevrolet Corvette C5 Z06--2002 Drag Strip < 4.00 11.818 117.26
Mercedes SL600 C&D 3/04 3.60 11.90 120.00
Lamborghini Murcielago R&T 5/02 3.60 12.00 121.00
Ferrari F430 F1 MT 6/05 3.70 11.70 122.80
Mercedes SL65 AMG C&D 1/05 3.80 11.90 123.00
Dodge Viper SRT-10 C&D 12/05 3.80 12.10 120.00
Porsche 911 Turbo Cabriolet C&D 9/04 3.80 12.20 116.00
Lamborghini Murcielago C&D 7/03 3.80 12.60 116.00
Dodge Viper SRT-10 MT 1/04 3.90 11.77 123.63
Dodge Viper SRT-10 MT 6/03 3.90 11.80 123.60
Porsche 911 GT3 MT 4/04 3.90 12.10 116.00
Chevrolet Corvette C6 Z06 R&T 12/05 3.90 12.20 120.70
Porsche 911 Carerra S Coupe R&T 3/05 3.90 12.30 114.80
Mercedes SL65 AMG R&T 1/05 4.00 12.00 122.80
Dodge Viper SRT-10 R&T 3/05 4.00 12.10 119.00
Ferrari 430 Spider R&T 9/05 4.00 12.30 116.90
Ferrari F430 Spider R&T 9/05 4.00 12.30 116.90
Lamborghini Gallardo R&T 3/04 4.00 12.30 117.40
Lamborghini Gallardo R&T 3/04 4.00 12.30 117.40
Chevrolet Corvette C5 Z06--2002 C&D 12/01 4.00 12.40 116.00
Porsche 911 GT3 C&D 1/04 4.00 12.30 114.00
Ferrari Challenge Stradale C&D 1/04 4.00 12.40 115.00
Porsche 911 Turbo (415 HP) R&T 3/05 4.00 12.40 115.60
Dodge Viper SRT-10 C&D 11/05 4.00 12.50 117.00
vnod's Chevrolet Corvette C5 2002 Z06 GTech 12/05 4.03 xx.xx xx.xx
Chevrolet Corvette C5 Z06 MT 2/02 4.07 12.48 114.90
Lamborghini Gallardo C&D 2/04 4.10 12.40 118.00
Chevrolet C6 Corvette Z51 C&D 12/04 4.10 12.60 114.00
Porsche 05 911 Carerra S C&D 11/04 4.10 12.60 112.00
Dodge Viper SRT-10 MT 11/05 4.20 12.20 118.00
Dodge Viper SRT-10 Coupe R&T 12/05 4.20 12.30 118.30
Ferrari 575M Maranello MT 6/03 4.20 12.30 118.60
Chevrolet Corvette C5 Z06 MT 6/04 4.20 12.40 117.00
Mercedes E55 AMG R&T 6/03 4.20 12.40 116.40
Porsche 911 GT3 R&T 3/05 4.20 12.40 113.80
BMW M5 C&D 1/06 4.20 12.50 118.00
Mercedes CLS55 AMG C&D 10/05 4.20 12.50 115.00
Mercedes CLS55 AMG C&D 1/06 4.20 12.60 114.00
Porsche 05 911 Carerra S MT 1/05 4.20 12.60 111.10
Chevrolet Corvette C5 Z06 MT 11/02 4.29 12.44 116.54
Ferrari 612 Scaglietti C&D 8/04 4.30 12.50 119.00
Ferrari Challenge Stradale MT 4/04 4.30 12.50 114.10
Lamborghini Gallardo MT 8/04 4.30 12.50 116.70
Mercedes E55 AMG C&D 5/03 4.30 12.50 116.00
Chevrolet C6 Corvette Z51 C&D 9/04 4.30 12.70 113.00
Chevrolet Corvette C5 Z06 R&T ?/02 4.30 12.70 112.10
Porsche 911 Carerra C&D 12/04 4.30 12.80 109.00
Chevrolet C6 Corvette Z51 MT 9/05 4.40 12.60 113.20
Mercedes CLS55 AMG MT 7/05 4.40 12.60 114.40
Mercedes CLS55 AMG RT 7/05 4.40 12.60 114.40
Mercedes AMG E55 Wagon R&T 11/05 4.40 12.80 112.40
Bently Continental GT R&T 9/04 4.40 12.90 110.20
Lotus Elise C&D 7/04 4.40 13.20 104.00
Mercedes CL600 C&D 8/04 4.50 12.60 115.00
Chevrolet Corvette C5 Z06 R&T 5/03 4.50 12.80 113.50
Chevrolet Corvette C6 Coupe R&T 3/05 4.50 12.80 114.50
Mercedes SLK55 AMG MT 4/05 4.50 12.80 109.20
Aston Martin D89 C&D 8/04 4.50 12.90 112.00
Bently Continental GT MT 10/04 4.50 12.90 109.70
Mercedes SLK55 AMG R&T 5/05 4.50 12.90 109.80
Ferrari 612 Scaglietti R&T 9/05 4.60 12.80 115.40
Chevrolet Corvette C5 Z06 MT 6/03 4.60 12.85 114.36

znod

Data base above updated with new tests and with all previously missing data except in one case.

Centurion

Thanks for the updated stats.

The Z06 gets you the most bang-for-buck no doubt!

Looks like Motor Trend is getting the best times out of the current model.

znod

Hi Pennyurion:

You are very welcome. I think the stats are very interesting to eyeball.

Yes, the Z06 gives great bang for the buck--particularly the 2002's to 2004's. And, the older ones obviously are very competitive with the M5--which is very good company to keep. I think the most impressive older Z06 performance is: Chevrolet Corvette C5 Z06 MT 6/04 4.20 12.40 117.00. Another had a faster 0 to 60 (4.1 sec.), but this time seems too fast all things considered. The really good drivers, who launch hard and powershift, get into the high 11's in the quarter with bone stock older ones--sometimes with and sometimes without drag radials.

Currently, you still can get very nice ones for the mid $30k's. I would not sell my 2002 for less than $37k (paid about $56k including TTL in 2/02). And, assuming you could get a new Z06, with no add-on, for $70k plus TTL, then you have to wonder if paying the extra $35k+ is worth it--especially for a street car. And, one could always do some mild modding to an "older" one and add significant steam.

But, I saw a new silver one at my Chevy dealer, and it was gorgeous. So, the updated styling, bragging rights, and extra fun under safe conditions is worth something.

I still really like the looks of my car, and I like the interior roominess (even the trunk is not too bad). The only thing I don't like about the older ones is that look a tad big. Regardless they are extremely light--about 3.1k lbs--about the same as the new ones.

znod

Hi Pennyurion:

You are very welcome. I think the stats are very interesting to eyeball.

Yes, the Z06 gives great bang for the buck--particularly the 2002's to 2004's. And, the older ones obviously are very competitive with the M5--which is very good company to keep. I think the most impressive older Z06 performance is: Chevrolet Corvette C5 Z06 MT 6/04 4.20 12.40 117.00. Another had a faster 0 to 60 (4.1 sec.), but this time seems too fast all things considered. The really good drivers, who launch hard and powershift, get into the high 11's in the quarter with bone stock older ones--sometimes with and sometimes without drag radials.

Currently, you still can get very nice ones for the mid $30k's. I would not sell my 2002 for less than $37k (paid about $56k including TTL in 2/02). And, assuming you could get a new Z06, with no add-on, for $70k plus TTL, then you have to wonder if paying the extra $35k+ is worth it--especially for a street car. And, one could always do some mild modding to an "older" one and add significant steam.

But, I saw a new silver one at my Chevy dealer, and it was gorgeous. So, the updated styling, bragging rights, and extra fun under safe conditions is worth something.

I still really like the looks of my car, and I like the interior roominess (even the trunk is not too bad). The only thing I don't like about the older ones is that look a tad big. Regardless they are extremely light--about 3.1k lbs--about the same as the new ones.
[/quote]Z06 drag-strip data added to post #85 for fun and to indulge myself.

Centurion

Funny you should mention that. I was kind of disappointed to see Chevrolet make the current Z06 with smaller dimensions.
But it works with their goal in bringing the weight down and getting quicker times at the track (Nurburgring).