In a test of the effectiveness of a device that is supposed, Ask an Expert

Statistics

In a test of the effectiveness of a device that is supposed to increase gasoline mileage in automobiles, 12 cars were run over a prescribed course both with and without the device. The mileages are given below.

Car	with device	without device
1	21	20.6
2	30	29.9
3	29.8	30.7
4	27.3	26.5
5	27.7	26.7
6	33.1	32.8
7	18.8	21.7
8	26.2	28.2
9	28	28.9
10	18.9	19.9
11	29.3	32.4
12	21	22

What test should be used?

a) Chi-Square Goodness-of-Fit test

b) Chi-Square Test of Independence

c) Paired-t Test

d) Pooled-t test

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91000035

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Discrete probability variablesthirtynbsppercent of

Discrete probability variables. Thirty percent of households say they would feel secure if they had? $50,000 in savings. You randomly select 8 households and ask them if they would feel secure if they had? $50,000 in sav ...

There is an 8 2-year bond which we buy now at which point

There is an 8%, 2-year bond, which we buy now at which point the required rates are 6%. If we intend to sell it in 2 years, when the market rates of interest are 2%, what is the market price of the bond then and now? A 1 ...

Sppose a and b are collectively exhaustive in addition pa

Suppose A and B are collectively exhaustive. In addition, P(A) = 0.2 and P(B) = 0.8. Suppose C and D are both mutually exclusive and collectively exhaustive. Further, P(C|A) = 0.7 and P(D|B) = 0.5. What are P(C) and P(D) ...

A study if the impact of stress on the amount of

A study if the impact of stress on the amount of beta-endorphins released in the blood was reported. Researchers took beta-endorphin levels for 19 patients 12 hours before surgery and again 10 minutes before surgery. If ...

Consumer product manufacturers commonly include customer

Consumer product manufacturers commonly include customer satisfaction surveys on product warranty cards that are sent back to the company. An outdoors company redesigned a popular camping tent, and it wants to know wheth ...

For each of the following describe1 the direction of the

For each of the following describe: 1. The direction of the relationship 2. The strength of the relationship 3. A verbal description of the relationship between the variables. r = -.96 between the craving for Taco Bell a ...

What are some ways being able to visually see data in a

What are some ways being able to visually see data in a graphic presentation beneficial?

A fair coin is flipped 100 times your friend proposes a bet

A fair coin is flipped 100 times. Your friend proposes a bet where if it lands on heads 49, 50, or 51 times, you win $4, but if it lands on heads more than 51 times or less than 49 times, you lose $1. Should you take the ...

The average time a person spends at the barefoot landing

The average time a person spends at the Barefoot Landing Aquarium Is 96 minutes. The standard deviation is 17 minutes, and this variable is normally distributed. What is the probability that a randomly selected visitor w ...

From a sample of 35 presidential elections - 19 of those

From a sample of 35 presidential elections - 19 of those have been Republican (R) victories - and 16 have been Democrat (D) victories. I need to know how to construction a 95% confidence interval about the proportion o ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert