An investigator compares the durability of two different compounds used in the manufacture of a certain automobile brake lining. A sample of 125 brakes using Compound 1 yields an average brake life of 41,759 miles. A sample of 163 brakes using Compound 2 yields an average brake life of 40,361 miles. Assume that the population standard deviation for Compound 1 is 3921 miles, while the population standard deviation for Compound 2 is 3097miles. Determine the 95% confidence interval for the true difference between average lifetimes for brakes using Compound 1 and brakes using Compound 2.

Step 3 of 3 :  

Construct the 95%95% confidence interval. Round your answers to the nearest whole number.

The following multiple regression model shows the expected PRICE of a VW Passat at auction (in $) as a function of the number of MILES on the Passat, the AGE of the Passat (AGE = 2020 – Year Assembled), and whether the Passat is SILVER (Yes = 1; No = 0):

Expected Price = 16,700 – 0.06MILES – 1,233AGE + 296SILVER

a. If the level of significance equals 0.05 and 100 Passats are in the sample, determine the critical value of the associated test statistic to assess whether the coefficient for AGE is significantly negative

b. You are deciding between two Passats: Passat A has 34,600 miles, was assembled in 2016, and is silver; Passat B has 46,200 miles, was assembled in 2017, and is red. Which Passat has the higher expected PRICE and by how much?

oyota USA is studying the effect of regular versus high-octane gasoline on the fuel economy of its new high-performance, 3.5-liter, V6 engine. Ten executives are selected and asked to maintain records on the number of miles traveled per gallon of gas. The results are:

a. STATE THE NULL HYPOTHESIS AND ALTERNATE HYPOTHESIS

7. You are considering a good-looking Toyota hybrid car priced at $28,000 or an elegant GM luxury car at $24,000. The fuel efficiency is rated at 50 miles per gallon for the Toyota and 25 miles per gallon for the GM. The annual maintenance cost for both cars is about 0.5% of the car price. The gasoline in the local market is selling at $2.00 per gallon. The cars are to be driven about 10,000 miles per year. You plan to keep your car for five years only. At the end of the fifth year, the resale values of the Toyota and the GM are about 40% and 30%, respectively, of their original prices. The interest rate is 6%. Which car is better choice form the standpoint of costs?

Given numRows and numCols, print a list of all seats in a theater. Rows are numbered, columns lettered, as in 1A or 3E. Print a space after each seat, including after the last. Ex: numRows = 2 and numCols = 3 prints:

1A 1B 1C 2A 2B 2C 

#include <iostream>
using namespace std;

int main() {
   int numRows = 2;
   int numCols = 3;

   // Note: You'll need to define more variables

   /* Your solution goes here */

   cout << endl;

   return 0;
}

Covid-19 started a derived demand, for instance, the high demand for hand sanitizer led to the derived demand of the isopropyl alcohol market .

What are some other covid- 19 derived demand, beside facemask ?

Definition of "Derived Demand"

Derived demand is a term in economics that describes the demand for a certain good or service resulting from a demand for related, necessary goods or services. For example, the demand for large-screen televisions creates a derived demand for home theater products such as audio speakers, amplifiers, and installation services.

A person with a cough is a persona non grata on airplanes, elevators, or at the theater. In theaters especially, the irritation level rises with each muffled explosion. According to Dr. Brian Carlin, a Pittsburgh pulmonologist, in any large audience you'll hear about 18 coughs per minute.

(b) Find the probability of four or fewer coughs (in a large auditorium) in a 1-minute period. (Use 4 decimal places.)

(c) Find the probability of at least eight coughs (in a large auditorium) in a 32-second period. (Use 4 decimal places.)

1. Sometimes consumers don’t face the same prices. For example, a movie theater may offer cheaper tickets to senior citizens, or local restaurants may provide student discounts. How would different prices charged to different people change our model of the consumer problem? Would people end up at points on the ICs with the same slope upon solving their consumer problems? If not, why wouldn’t they be able to improve themselves through mutually beneficial trades (keeping in mind the movie ticket and meal examples provided above)?

Consider a home theater system consisting of a television set, a receiver, a DVD player, and speakers. Draw a system diagram for this system. Include both components and links.What are the inputs to this system? What are the outputs? (Remember that the DVD player and receiver are both components within the system). Now draw a system diagram for the receiver subsystem. Include both its primary components and the links between them. What are the inputs and outputs for the receiver subsystem?

Do these inputs and outputs confirm to the links connected to the receiver in your system diagram?