A sample of 65 observations is selected from one population. The sample mean is 2.67 and the sample standard deviation is 0.75. A sample of 50 observations is selected from a second population. The sample mean is 2.59 and the sample standard deviation is 0.66. Conduct the following test of hypothesis using the .08 significanc
Using the enclosed survey (customer satisfaction survey for Hitachi Automotive products - enclosed), create at least 3 different hypothesis statements based on the perceived results of the survey. State both the null and alternative hypotheses for each hypothesis statement.
A recent article in theWall Street Journal reported that the prime rate for large banks now exceeds 9 percent. A sample of eight small banks in the Midwest revealed the following prime rates (in percent): 10.1 9.3 9.2 10.2 9.3 9.6 9.4 8.8 At the .01 significance level, can we conclude that the prime rate for small banks als
The management of White Industries is considering a new method of assembling its golf cart. The present method requires 42.3 minutes, on the average, to assemble a cart. The mean assembly time for a random sample of 24 carts, using the new method, was 40.6 minutes, and the standard deviation of the sample was 2.7 minutes. Usi
The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles. The standard deviation of the mileage is 5,000 miles. The Crosset Truck Company bought 48 tires and found that the mean mileage for their trucks is 59,500 miles. Is Crosse
The article "The Age of Discontent" could be found at http://www.robertkotlermd.com/latimes.htm From the information that is provided in the article, identify the source of the statistic, the use of the statistic, and decide if the statistic might be misleading (and why or why not). Report the findings in 350-500 words.
FIRST In 1990, 5.8% of job applicants who were tested for drugs failed the test. At the 0.01 level, test the claim that the failure rate is not lower if a random sample of 1520 current job applicants results in 58 failures. Work and steps must be shown. Write each step of hypothesis procedure SECOND The expense of movi
Bubble Bottling Co. is operating an old machine that fills each one-liter plastic bottle of soda prior to capping. The average fill seems O.K., but the operator has reported lately that too many bottles seem either too full or too empty coming off the line. The problem, of course, could be the variation in the capacity of the bo
What are the requirements for applying the hypothesis test for the difference in two population proportions? What are the calculations (computations)?
How is hypothesis testing utilized for business research?
The response to the question: "What is the five-step process for hypothesis testing? Is the order important? Why or why not?"
Please see the attached file for full problem description. 1. Use the following information for questions a-b. The Waterhole bar and grill decided to run a special offer of a free fried zucchini appetizer with the purchase of a pitcher of beer and a sandwich for Monday nights only during the height of the baseball season. A
Problem: A farmer sells sacks of potatoes at a county fair. Each bag is labeled 60 pounds. The fair organizers employ a statistician to verify that all business is conducted accurately. The statistician selects 50 sacks of the farmer's potatoes and finds a sample mean of 57 pounds. The standard deviation is 8 pounds. Test the cl
As a part of a survey on the use of Office Suites Software, the company doing the polling wanted to know whether its population was uniformly distributed over the following age distribution... Based on the data, do you think that the respondents are uniformly distributed over the age categories? (see attachment for full questi
The Thompson's Discount Appliance Store issues its own credit card. The credit manager wants to find whether the mean monthly unpaid balance is more than $400... (see attachment for full question) The Thompson's Discount Appliance Store issues its own credit card. The credit manager wants to find whether the mean monthly u
T F 1. If the null hypothesis is stated that the average number of milligrams of sodium in a manufacturer's can of soup is 200 mg, an appropriate alternative hypothesis is that the average number of milligrams of sodium exceeds 200 mg. T F 2. If a null hypothesis is tested and rejected at the a = 0.05 level, the same null hypot
A study of tobacco quitting was done. The authors concluded that a significant preictor of maintaining cessation was forbidding smoking in the house, and gave the following supportive statistics: OR 1.95; C.I. 1.05-3.6; p<0.01 What is the exposure? What is the outcome? What does OR stand for? What does CI stand for? St
1(a) The Durbin Watson (d) statistic is defined as (see attached) Where u t is the OLS residual. Explain what hypothesis d tests. (b) Show that if the null hypothesis is true, d is approximately equal to 2. (c) The following equation was estimated by OLS on UK quarterly data Ct = − 370.87 + 0.916YDt + u t t = 1,
I. The Dean of Students is interested in how long students spend commuting to school each day because the administration has been considering building dormitories. Since this college is highly selective and draws students from all the boroughs as well as the surrounding areas. A study was undertaken to see if the travel time is
1) The FMA Company has designed a new type of 16 lb. bowling ball. The company knows that the average man who bowls in a scratch league with the company's old ball has a bowling average of 155. The variance of these averages is 100. The company asks a random sample of 100 men bowling in scratch leagues to bowl
You are a brand manager and have been running TV ads to market your product. However, you are considering running a series of spots that specifically targets wealthy consumers. The spots will cost $2K out of your $100K advertising budget. You estimate the market potential for wealthy consumers to be $250K. You hire a marketing r
A soda distributor claims that a new display, featuring Lebron James will increase product sales in supermarkets by an average of 50 cases in a week. For a random sample of twenty supermarkets, the average sales increase was 41.3 cases, and varied across supermarkets by about 12.2 cases. Most imporatantly, what managerial co
To answer the question below, I was instructed to utilize one or more of the following techniques: -Confidence intervals and hypothesis testing -Decision trees (and their use in solving managerial problems), -Critical fractile analysis (and its use in determining optimal demand levels), -Analysis of variance/ANOVA (and its
There are three manufacturing plants on Lake Chinquapin: 1, 2, and 3. Each factory emits two types of pollutants, P1 and P2, into the water. If the waste from each factory is processed, the pollution in the lake can be reduced. It costs $15 to process one ton of Factory 1 waste, and each ton processed reduces the amount of P
You are a brand manager and have been running general TV spots to market your product. Now, you are considering running a series of spots that specifically targets wealthy consumers. The spots will cost $2K out of your $100K advertising budget. You estimate the market potential for wealthy consumers to be $250K. You hire a m
I have attached my methodology with statistical information. I used chi square to compare relationships, and I need assistance in the validity of the diagnosis. I believe I did it correctly. Can someone review the information, and let me know if it makes sense. Any recommendations or suggestions are appreciated. Specifically
Obtain the critical values of the F distribution for the following situations: (a). F .01, numerator df = 8, denominator df = 6 (b). F .01, numerator df = 5, denominator df = 120 (c). F .05, numerator df = 12, denominator df = 24
Question 3 (35 Points): The director of quality at a large HMO wants to evaluate the patient waiting times at a local facility. She wants to estimate the mean waiting time within a margin of error of 5 minutes using a 95% confidence interval. An a priori guess of the range of waiting times is 0 to 60 minutes. a) For an a pri
Question 2: An automaker tests the accuracy of speedometers purchased from a vendor on a weekly basis. The test plan calls for testing a random sample of 25 speedometers at a nominal speed of 55 mph. A statistically significant deviation at 1% significance level from the nominal value results in rejection of the lot supplied by
Trying to use mathematical models to design effective hypothesis testing during experiments. In hypothesis analysis the null hypothesis and significance level of the test must be set prior to data collection. When the consequences of false judgment are severe, one needs to fine tune test parameters in order to control the magni