.Tire manufacturer is interested in testing the fuel economy for two different tread patterns. Tires of...

.Tire manufacturer is interested in testing the fuel economy for two different tread patterns. Tires of each tread type were driven for 1000 miles on each of 9 different cars. The mileages, in miles per gallon, were as follows. Test whether the mean mileage is the same for both types of tread. (ANOVA test)

Car	1	2	3	4	5	6	7	8	9
Tread A	24.7	22.5	24.0	26.9	22.5	23.5	22.7	19.7	27.5
Tread B	20.3	19.0	22.5	23.1	20.9	23.6	21.4	18.2	25.9

Expert Solution

orchestra answered 2 years ago

A tire manufacturer is interested in testing the fuel economy for two different tread patterns. Tires...

A tire manufacturer is interested in testing the fuel economy for two different tread patterns. Tires of each tread type were driven for 1000 miles on each of 9 different cars. The mileages, in miles per gallon, were as follows: Car Tread A Tread B 1 24.7 20.4 2 22.6 19.0 3 23.9 22.4 4 26.8 23.0 5 22.4 20.8 6 23.4 23.5 7 22.6 21.3 8 19.7 18.1 9 27.3 25.8 (a) Construct an 80% confidence interval for the...

A tire manufacturer believes that the tread life of its snow tires can be described by...

A tire manufacturer believes that the tread life of its snow tires can be described by Normal model with a mean of 32,000 miles and a standard deviation of 2500 miles. a). If you buy a set of these tires, would it be reasonable for you to hope that they'll last 40,000 miles? Explain. b). Approximately what fraction of these tires can be expected to last less that 30,000 miles? c). Approximately what fraction of these tires can be expected...

A manufacturer claims that the average tread life of a premium tire exceeds the average tread...

A manufacturer claims that the average tread life of a premium tire exceeds the average tread life of economy tire of the same size by at least 5000 miles. To test this claim, 50 pieces of each type of tires were tested under similar conditions. The premium tire had an average tread life of 43000 miles with a sample standard deviation of 2300, while economy tire had an average tread life of 37500 miles with a sample standard deviation of...

January of 1999, the German Auto Bild magazine randomly tested different tread patterns across all tire...

January of 1999, the German Auto Bild magazine randomly tested different tread patterns across all tire brands as their journalists toured from the UK to the Bulgarian coast. They discovered on one leg of the tour that out of 100 tires, or 12%, shortcomings were due to defective sidewall wire. On another leg they found 125 tires, 15% of the defects were due to poor vulcanization. a) Find an appropriate 95% confidence interval. Explain the difference in outcomes. Let poor...

Super Tread Inc. is a large manufacturer of auto tires. Super Tread has provided the following...

Super Tread Inc. is a large manufacturer of auto tires. Super Tread has provided the following information: Sales Revenue $55,000 Beginning Finished Goods Inventory 20,000 Cost of Goods Sold 33,000 Cost of Goods Manufactured 40,000 Calculate the amount of ending Finished Goods Inventory reported on Super Tread's balance sheet. A. $60,00 B. $7,000 C. $27,000 D. $15,000

The Title Tire and Rubber Company periodically tests its tires for tread wear under simulated road...

The Title Tire and Rubber Company periodically tests its tires for tread wear under simulated road conditions. To study and control the manufacturing process, 20 samples, each containing three radial tires, were chosen from different shifts over several days of operation, with the following results. Tread wear measurements are in hundredths of an inch. Sample Tread Wear 1 31 42 28 2 26 18 35 3 25 30 34 4 17 25 21 5 38 29 35 6 41 42...

The Goodman Tire and Rubber Company periodically tests its tires for tread wear under simulated road...

The Goodman Tire and Rubber Company periodically tests its tires for tread wear under simulated road conditions. To study and control the manufacturing process, 20 samples, each containing three radial tires, were chosen from different shifts over several days of operation, with the following results. Tread wear measurements are in hundredths of an inch. Sample Tread Wear 1 31 42 28 2 26 18 35 3 25 30 34 4 17 25 21 5 38 29 35 6 41 42...

Suppose you work at a large tire distribution center. The tires’ average tread life has been...

Suppose you work at a large tire distribution center. The tires’ average tread life has been 50,000 miles with a standard deviation of 5,000 miles. At the end of the year, the company can reevaluate their supply contract. There are four supply options for the next contract: the current supplier or one of three competitors. The current supplier produces tires with an average tread life of 50,000 miles with a standard deviation of 5,000 miles. Competitor A claims to produce...

A tire manufacturer believes that the life of its tires follow a normal distribution with a...

A tire manufacturer believes that the life of its tires follow a normal distribution with a mean of 46,000 miles and a standard deviation of 4,000 miles. What mileage can he guarantee each tire to last so that 99% of the tires last longer than the guaranteed lifetime?

1. A tire manufacturer determines at what temperature the tires will tend to bubble. In a...

1. A tire manufacturer determines at what temperature the tires will tend to bubble. In a sample of 21 tires, the mean temperature was 120 degrees F. with a standard deviation of 12 degrees. Construct the 98% confidence interval for the population mean. 2. The standard deviation of the length of 31 steel rods that are cut to be 3 feet is 0.023 feet. What is the 80% confidence interval for the population variance and the standard deviation? 3. In...

Question