What inferential statistic would you choose to test the following hypotheses? Briefly explain your answers. There is a positive relationship between the patient's rating of pain using the Visual Analog scale and the amount of drug administered to the patient. The annual income among male and female nurses differs signifi
A social psychology graduate student hypothesizes that taller women tend to date taller men, and that shorter women tend to date shorter men. To test this hypothesis, she visits a dance club just off campus and interviews the first 10 couples she meets, measuring (to the nearest centimeter) the heights of the men (X) and the he
At a 0.05 level of significance, can you justify the Deputy's claim that the average salary of a public sector manager is lower than that of his or her counterpart in the private sector?
Public service managers complain that their salaries are falling behind those of their counterparts in the private sector. To make a strong case for his employees, the Deputy Minister of Finance has produced a document for the Minister's consideration. The document compares the average salary of ten highly placed managers with t
Hypothesis Testing for difference between means. The task force claims that the average cost per visit will be significantly less if the suggestion is adopted. At a 0.05 level of significance, test the claim of the task force.
Because of massive cutbacks in transfer payments to the provinces, provincial governments are in a quandary over how to maintain a high standard in health care. Given the sensitive nature of the issue, the provinces have set up independant commissions to study the issue. A task force in Alberta has suggested that more "community
The "Mars" division of a big auotmobile manufacturer specializes in manufacturing scooters for export. The company claims that these scooters average at least 55 miles per gallon in city driving. An independant consumer avocate road tested a sample of 25 scooters. The sample showed an average of 60 miles per gallon, with a stand
Can she conclude there is a difference in the mean number of minutes spent at doing the "end of day closing" per week by department?
The manager of a department store wishes to study the number of minutes top salespeople at his store spend at their computer terminals in order to process "end of day closing" by the department name. The manager selected a sample of 5 (five) salespeople from each of three departments. At the .05 significance level, can
Hypothesis Testing: With a 0.05 level of significance, can we conclude that the mean age of the workforce has declined?
A big multinational corporation based in Toronto recently moved it's production facilities to Mexico. When the corporation was in Toronto, it had an older, experienced labour force with a mean age of 45 years. Now that it has moved to Mexico, the company wishes to find out if the average age of the workforce has declined. A samp
A cereal manufacturer sells boxes of cereal that list the weight as 19 oz. A random sample of 60 boxes was taken, with the contents carefully weighed. Assume a mean weight of (random variable?) x = 19.9 oz. and a standard deviation of s = 0.67 oz. resulted from the sample data. would this idicate that the actual mean weight,u of
A nectarine-packing firm claims that the nectarines they ship have a mean weight of 5.22 ounces. A test on n = 10 randomly selected nectarines, gave the following results, in ounces: 5.94 5.15 5.73 6.31 5.63 5.04 5.10 5.03 5.13 5.21 Do the data indicated that the actual mean weight is less than the mean weight claimed by t
Please see the paper enclosed. Perform a Z -test on a 52 sample class (26 samples in the paper + 26 samples in the 2nd attachment), and determine the p-value to validate the conclusion (decision). Please perform all the calculations similar to how it was done in the paper meaning not just giving me the result number but show
Fairfield Homes is developing two parcels near Pigeon Fork, Tennessee. In order to test different advertising approaches, they use different media to reach potential buyers. The mean annual family income for 75 people making inquiries at the first development is $150,000, with a standard deviation of $40,000. A corresponding sam
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.
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
How is hypothesis testing utilized for business research?
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 attachement for full question)
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
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
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
Let mu be the mean speed indicated by the speedometers when the testing apparatus is set at the nominal speed of 55 mph. Set up the hypotheses for doing the test. Is this significant evidence to suggest that the mean reading deviates significantly from the nominal value of 55 mph at the 1% significance level? Answer by calculating the P-value.
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