a highway engineer wishes to compare the convenience and safety of two interstate highways in a...

a highway engineer wishes to compare the convenience and safety of two interstate highways in a large city. two variables to consider are the time it takes to get to a destination and the number of accidents on the roads

1.Define the population

2. what type of samples can be used?

3. are the samples independent or dependent?

4.state the hypothesis for each.

a.the time it takes to get from point A to B

b. the proportions of accidents on the highways

5. what significance level would you use?

Expert Solution

orchestra answered 2 years ago

The Department of Public Works and Highways (DPWH) is considering the construction of a new highway...

The Department of Public Works and Highways (DPWH) is considering the construction of a new highway through a scenic rural area. The road is expected to cost 60 Million Birr with annual upkeep estimated at 500,000 Birr. The improved accessibility is expected to result in additional income from tourists of 7.5 Million Birr per year. The road is expected to have a useful life of 25 years. If the rate of interest is 15%, should the road be constructed?

The state highway department is studying traffic patterns on one of the busiest highways in the...

The state highway department is studying traffic patterns on one of the busiest highways in the state. As part of the study, the department needs to estimate the average number of vehicles that pass an intersection each day. A random sample of 64 days gives us a sample mean of 14,205 cars and a sample standard deviation of 1,010 cars. Compute the 99% confidence interval for the mean ? number of cars passing the intersection. Note : the Answer should...

1) The number of cracks in a section of interstate highway that are significant enough to...

1) The number of cracks in a section of interstate highway that are significant enough to require repair is assumed to follow a Poisson distribution with mean of three cracks every five miles. What is the probability that there are exactly two cracks that require repair in 3 miles of highway? 2) The volume of a shampoo filled into a container is a continuous random variable uniformly distributed with 240 and 260 milliliters. What is the probability that the container...

A mechanical engineer wishes to compare strength properties of steel beams with similar beams made with...

A mechanical engineer wishes to compare strength properties of steel beams with similar beams made with a particular alloy. Each beam will be set in horizontal position with a support on each end, a force of 2500 lbs will be applied at the centre, and the deflection will be measured. From past experience with such beams, the engineer is willing to assume that the true standard deviation of deflection for both types of beam is .05 inches. Because the alloy...

A proposed bridge on the interstate highway system is being considered at the cost of 5...

A proposed bridge on the interstate highway system is being considered at the cost of 5 million dollars. It is expected the bridge will have a life of 30 years. Construction costs will be paid by government agencies. Operation and maintenance costs are estimated to be 180,000 per year. Benefits to the public are estimated to be 1,100,000 per year. The building of the bridge will result in an estimated cost of 250,000 per year to the general public. The...

The creation of the US Interstate Highway System was the single action that most changed the...

The creation of the US Interstate Highway System was the single action that most changed the face of America after the World War II. T or F

C++ Primary U.S. interstate highways are numbered 1-99. Odd numbers (like the 5 or 95) go...

C++ Primary U.S. interstate highways are numbered 1-99. Odd numbers (like the 5 or 95) go north/south, and evens (like the 10 or 90) go east/west. Auxiliary highways are numbered 100-999, and service the primary highway indicated by the rightmost two digits. Thus, the 405 services the 5, and the 290 services the 90. Your program will prompt the user to type a highway number ("Please enter a highway number, Ex: 65: "), read in the number typed by the...

The highway department wants to estimate the proportion of vehicles on Interstate 25 between the hours...

The highway department wants to estimate the proportion of vehicles on Interstate 25 between the hours of midnight and 5.00 A.M. that are 18-wheel tractor trailers. The estimate will be used to determine highway repair and construction considerations and in highway patrol planning. Suppose researchers for the highway department counted vehicles at different locations on the interstate for several nights during this time period. Of the 3601 vehicles counted, 934 were 18-wheelers. A. determine the point estimate for the proportion...

A traffic study conducted on an interstate highway shows that vehicle speeds (in mph) are normally...

A traffic study conducted on an interstate highway shows that vehicle speeds (in mph) are normally distributed with a mean of 61.3 and a standard deviation of 3.3. a) Sketch the distribution of vehicle speeds. Show 3 steps of standard deviation above and below the mean. b) If a vehicle is randomly checked, what is the probability that its speed is greater than 70? Include a sketch. c) If 5 vehicles are randomly sampled, what is the probability that their...

The speeds of car traveling on Interstate Highway I-35 are normally distributed with a mean of...

The speeds of car traveling on Interstate Highway I-35 are normally distributed with a mean of 74 miles per hour and a standard deviation of 6 miles per hour. (a) Find the percentage of the cars traveling on this highway with a speed i. of more than 85, ii. between 65 to 72. (b) If a BMW is at the speed that is faster than 90 percentage of cars, what is the speed of the BMW?

Question