Please type answer, can't see written answers well.

Also PLEASE PROVIDE BELL SHAPED CURVE** That is the part I struggle with the most.

The airlines industry measures fuel efficiency by calculating how many miles one seat can travel, whether occupied or not, on one gallon of jet fuel. The following data show the fuel economy, in miles per seat for 17 randomly selected flights on Delta and United. Assume the two population variances for fuel efficiency for the two airline are equal.

Delta

United

a. Conduct a the 95% confidence interval estimate of the population?

b. Perform a hypothesis test using α = .05 to determine if the average fuel efficiency  differs between the two airlines.

c. Determine the p-value and interpret the results.

On May 31, 2016, Sandals report purchased a truck at a cost of $160,000. before placing the truck into service, The company spend $2,500 painting it, $500 replacing tires, and $5,000 overhauling the engine. The truck should remain in service for 5 years and have a residual value of $7,500. The truck’s annual mileage is expected to be 15,000 in each of the first two years and 10,000 miles in the next three years. In deciding which depreciation method to use, the general manager request depreciation schedule for each of the depreciation methods (straight line, unit-of production, and double – declining-balance). work out each depreciation in the depreciation schedule. pass all transaction in the journal entry. journal entry must be included. show working out for each depreciation.

work out the unit of production depreciation in the depreciation schedule. should work out based off the following information listed below

Miles                                       60,000

Cost                                         165,000                                  

Residual value                        7,500                                      

Depreciable amount                $165,000 - $7,500 = $157,500

Depreciation per unit             157,500 / 60,000 = 2.63

*****Show step-by-step in Excel******

An automobile rental company wants to predict the yearly maintenance expense (Y) for an automobile using the number of miles driven during the year ( X1 ) and the age of the car ( X2 , in years) at the beginning of the year. The company has gathered the data on 10 automobiles and the regression information from Excel is presented below. Use this information to answer the following questions.

Summary measures Multiple R 0.9689 R-Square 0.9387 Adj R-Squared 0.9212 StErr of Estimate 72.218

a. Use the information above to write out the estimated linear regression model.

b. Interpret each of the estimated coefficients of the regression model in part (a).

c. Identify and interpret the coefficient of determination ( R2 ) and the adjusted R2 .

d. Does the given set of explanatory variables do a good job of explaining changes in the maintenance costs? Explain why or why not.

For this exercise, round all regression parameters to three decimal places.

Characteristics of traffic flow include density D, which is the number of cars per mile, and average speed s in miles per hour. Traffic system engineers have investigated several methods for relating density to average speed. One study† considered traffic flow in the north tube of the Lincoln Tunnel and fitted an exponential function to observed data. Those data are partially presented in the table below.

(a) Make an approximate exponential model of D as a function of s.
D(s) =

(b) Express using functional notation the density of traffic flow when the average speed is 24 miles per hour.
D

Calculate that density. (Round your answer to the nearest whole number.)
cars/mi

(c) If average speed increases by 1 mile per hour, what can be said about density? (Round your answer to one decimal places.)

The density D decreases by  %.

Consider the following hypothetical natural experiment. The United States imposes a 25% tariff on imported automobiles (cars) in 2020 but does not do so on imported trucks. Canada does not impose such a tariff. In 2020 vehicles (cars+light trucks) in the U. S. (noncommercial) averaged 30 mpg while vehicles in Canada averaged 35 mpg. In 2025 vehicles in the US averaged 35 mpg while vehicles in Canada averaged 45 miles per gallon. Assume (this is a hypothetical natural experiment) that there are no differences between drivers and economic conditions in Canada and the U.S. In an actual analysis of such a situation any observable differences would be addressed using some matching algorithm. a. Using the difference in difference estimator calculate the yearly impact of the tariff on fuel efficiency for all vehicles. b. Assuming that there were 10 million vehicle (car and light truck) sales in the U.S. in 2025 and that each vehicle drives on average 10,000 miles per year, how much more gasoline would be consumed by U. S. drivers in 2025 due to the tariff?

The normal monthly precipitation (in inches) for August is listed for 20 different U.S. cities. Find any outliers and provide an explanation for them. SHOW THE WORK.

0.4 1.0 1.5 1.6 2.0

2.2 2.4 2.7 3.4 3.4

3.5 3.6 3.6 3.7 3.7

3.9 4.1 4.2 4.2 7.0

An iron sulfide contains 36.5% S by mass. The iron sulfide is heated in an atmosphere of pure oxygen, which produces SO2(g) and an iron oxide containing 27.6% O by mass. Write a balanced equation for the reaction. If 1.0 kg of the iron sulfide reacts with excess oxygen, what is the theoretical yield of the iron oxide?

Given that the density of air at 0.987 bar and 27°C is 1.146 kg m 3, calculate the mole fraction and partial pressure of nitrogen and oxygen assuming that a) air consists only of these two gases b) air also contains 1.0 mole per cent Ar. Please show step by step of calculations.

An equilibrium mixture is 1.0 L flask contains 0.70 mol HI(g) and 0.10 mol each of I2(g) and H2(g). If 0.30 mol H2, 0.60 mol I2 and 0.20 mol HI are added to this equilibrium mixture how many moles of each gas will be present when equilibrium is reestablished?