Reference no: EM13923602
1) Discover Card would like to test the hypothesis that the average credit score for an adult in Dallas is different from the average credit score for an adult in Houston. A random sample of 40 adults in Dallas had an average credit score of 699 and a random sample of 35 adults in Houston had an average credit score of 682. It is believed that the population standard deviation for credit scores is 44 and 41 for Dallas and Houston residents, respectively. Discover Card would like to set α = 0.05. Define Population 1 as Dallas and Population 2 as Houston and use the critical value approach to test this hypothesis.
2) Auto Trader Group (ATG) would like to test the hypothesis that the average age of an imported car on the road is greater than the average age of a domestic car. The following data shows the sample size and the average age of cars for import and domestic cars along with the population standard deviations.
Domestic Import
Sample mean 9.4 years 10.8 years
Sample size 33 36
Population standard deviation 3.2 years 2.8 years
Define Population 1 as import cars and Population 2 as domestic cars. Construct a 90% confidence interval for the difference in population mean and interpret the results.
3) Farmers Insurance Group would like to test the hypothesis that the average number of miles driven per month by a male driver exceeds the average number of miles driven per month by a female driver by more than 50 miles. The following data summarizes the sample statistics for the miles driven per month by each gender. Assume that the population variances are equal.
Male Female
Sample mean 685 580
Sample size 13 16
Sample standard deviation 130 120
Define Population 1 as male drivers and Population 2 as female drivers and use the critical value approach to test this hypothesis with α = 0.05.
4) Holiday Inn Express has developed a training program for its hotel staff in an effort to increase customer satisfaction. The employees at the Philadelphia Midtown location completed the training while the employees at the Philadelphia E Penns Landing location did not. Holiday Inn Express would like to test the hypothesis that the average customer satisfaction score at the Midtown location is higher than the average satisfaction score at the E Penns Landing location. The following data summarizes the sample statistics for customer satisfaction, on a scale of 1 to 100, for each location. Assume that the population variances are unequal.
Midtown E Penns Landing
Sample mean 82.6 78.3
Sample size 25 20
Sample standard deviation 5.0 6.0
Define Population 1 as the Midtown location and Population 2 as E Penns Landing location and use the critical value approach to test this hypothesis with α = 0.01.
|
Perceived corporate governance of the company
: You have met with a potential client, who informs you that all the employees and officers of his company are bonded. For this reason, he is requesting that under these conditions that you not look at his company's system of internal control so his..
|
|
Contrast the different effect on short-term exchange rates
: Contrast the different effect on short-term exchange rates of an increase in domestic real output under the BOP approach and the Monetary approach.
|
|
What was the balance of unilateral transfers for japan
: The BOP of Japan showed the following entries for 2010: a capital account surplus of 50, a deficit in the services account of 15, and a trade deficit of 45. The change in the official reserves was zero. What was the balance of unilateral transfers fo..
|
|
Specific list of requirements for the ceo
: You decide to prepare a specific list of requirements for the CEO so that if she agrees to overhaul the existing hodgepodge and create a truly functional MIS system, you are prepared.
|
|
Critical value approach to test the hypothesis
: Discover Card would like to set α = 0.05. Define Population 1 as Dallas and Population 2 as Houston and use the critical value approach to test this hypothesis.
|
|
What is the opportunity cost of cash option over first year
: The new car costs $19,999. Two options; 1) down payment of 20% and finance the balance with no interest and payments for the first few months, 2) or get a rebate of $1,000 if pays cash. The financing alternative would require to pay $460 a month for ..
|
|
Optimal decision rules for katrina candies
: From the scenario for Katrinas Candies, suggest one (1) method in which Herb could use a cost benefit analysis to argue for or against an expansion. Create three (3) optimal decision rules for Katrina's Candies (e.g., whether to hire more staff or..
|
|
Incurable muscle-wasting disease
: Muscular dystrophy is an incurable muscle-wasting disease. If a woman has a child with muscular dystrophy the probability is 2/3 that she is a carrier and 1/3 that she is not a carrier. There is a screening test called the CK test that is positive..
|
|
Make a histogram based on the frequency table
: Q1. A prison psychologist recorded the number of rule infractions for 15 prison inmates over a six-month period to be 5, 4, 2, 4, 3, 5, 2, 0, 4, 4, 5, 5, 3, 4, and 3. a. Make a frequency table. b. Make a histogram based on the frequency table.
|