A random sample was selected to determine whether the gas fuel cost different between east side...

A random sample was selected to determine whether the gas fuel cost different between east side (consider as 1) and west side (consider as 2). Given α=0.05. The data are summarized below:

East Side West Side Difference

Average 2.90/gal 2.99/gal -0.09/gal

Count 12 12 12

Standard deviation 0.81 0.95 0.38

(d) Is there sufficient evidence to indicate that the gas fuel cost different between east side and west side?

Group of answer choices

Yes

No

Expert Solution

Please rate, if it is really helps you. Thank you.

milcah answered 1 year ago

A sample of different countries is selected to determine is there a significant difference between trade...

A sample of different countries is selected to determine is there a significant difference between trade freedom index and financial freedom index. Use α=0.01 and the following data to test the hypothesis. a) Set up the null and alternative hypotheses for testing whether there is a difference between trade freedom and financial freedom. b)Given the hypotheses in (a) would you reject null-hypothesis?(Note the significance level of 1%). Please provide the explanation why do you reject or do not reject your...

To determine whether the pipe welds in a nuclear power plant meet specifications a random sample of welds is selected

To determine whether the pipe welds in a nuclear power plant meet specifications a random sample of welds is selected, and tests conducted on each. Weld strength is measured as the force required to break the weld. Suppose the specifications state that mean strength of welds should exceed 100lb/in2; the inspection team decides to test Ho : μ = 100 versus Ha : μ < 100 why is this not as good as Ha : μ > 100

suppose a random sample of 137 households in a city was selected to determine the average...

suppose a random sample of 137 households in a city was selected to determine the average annual household spending on food at home for city residents. The sample results are contained in the accompanying table. Complete parts a and b below. a. Using the sample standard deviation as an estimate for the population standard deviation, calculate the sample size required to estimate the true population mean to within ±25 with 90% confidence. How many additional samples must be taken? The...

29) Random samples of four different models of cars were selected and the gas mileage of...

29) Random samples of four different models of cars were selected and the gas mileage of each car was measured. The results are shown below. Model A / Model B / Model C / Model D 26 / 27 / 20 / 28 30 / 23 / 25 / 27 25 / 26 / 25 / 21 25 / 22 / 26 / 26 Test the claim that the four different models have the same population mean. Use a significance...

A random sample of 400 men and 400 women was randomly selected and asked whether they...

A random sample of 400 men and 400 women was randomly selected and asked whether they planned to attend a concert in the next month. The results are listed below. Perform a homogeneity of proportions test to test the claim that the proportion of men who plan to attend a concert in the next month is the same as the proportion of women who plan to attend a concert in the next month. Use α = 0.04. men women plan...

A sample of HR managers were selected to examine whether they expect job seekers of different...

A sample of HR managers were selected to examine whether they expect job seekers of different races (Black vs. White) to negotiate salary offers. In the experiment, each participant was randomly assigned to view one of two versions of a fictitious job seeker’s resume. Resumes in the two conditions contained identical names, background, and job history information; the job seeker’s race was manipulated through the pictures shown at the top of the resume (Black male or White male). Each participant...

A random sample of 100 employees from 5 different companies was randomly selected, and the number...

A random sample of 100 employees from 5 different companies was randomly selected, and the number who take public transportation to work was recorded. The results are listed below. Perform a homogeneity of proportions test to test the claim that the proportion who take public transportation to work is the same in all 5 companies. Use α= 0.01. 1 2 3 4 5 Use Public Trans. 18 25 12 33 22 Don't Use Public Trans. 82 75 88 67 78...

Income East and West of the Mississippi For a random sample of households in the US,...

Income East and West of the Mississippi For a random sample of households in the US, we record annual household income, whether the location is east or west of the Mississippi River, and number of children. We are interested in determining whether there is a difference in average household income between those east of the Mississippi and those west of the Mississippi. Incorrect answer iconYour answer is incorrect. (a) State the null and alternative hypotheses. Your answer should be an...

To determine whether the pipe welds in a nuclear power plant meet specifications, a random sample...

To determine whether the pipe welds in a nuclear power plant meet specifications, a random sample of welds is selected, and tests are conducted on each weld in the sample. Weld strength is measured as the force required to break the weld. Suppose the specifications state that mean strength of welds should exceed 100 lb/sq in; the inspection team decides to test H0 ; μ=100 versus Ha ;μ > 100.+ Explain why it might be preferable to...

To best determine the fuel economy of a car, an automotive technician calculates the mean gas...

To best determine the fuel economy of a car, an automotive technician calculates the mean gas mileage computed for 10 full tanks of gas. a. Use intervals of 0.9 beginning at 19.0 to compute the mean fuel economy (in miles per gallon) from the following data. 21.6 19.5 20.6 20.5 19.4 21.3 22.2 20.1 19.6 21.8 b. At $3.00 per gallon, use the mean fuel economy to calculate the average cost per mile to operate this vehicle --------------------------------------------------------------------------------------------------------------------------------------------------- a. The...

Question