# 5 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 Cross
XYZ Tv news in a segment on the price of gasolin, reported last evening that the mean price nationwide is $ 1.50 jper gallon for self-serve regular unleaded. A rando sample of 35 statations in the Globe, AZ area revealed theat the mean price was $ 1.52 per gallong and that the standard deviation was $ 0.05 per gallon. At the .05
A sample of 100 orders revealed that 82 were delivered within the promised time. At the 0.10 significance level, can we conclude that less than 90% of the orders are delivered in less than 10 minutes? What is the Null Hypothesis, Alternate Hypothesis, Alpha, Choice of test, Critical Value of test? Show computations. Interpret fi
1. Fill in the steps of the hypothesis test for the following problem. Let Population 1 be the population of convictions in Albany County. An actuary for the Life Trust Insurance Company is responsible for adjusting automobile insurance rates based on DWI convictions. The New York State Department of Motor Vehicles provided
Please note: Type the solutions into Microsoft Word. The solution should include the calculation steps, calculation equations, and all of the intermediate results. Use the Equation Editor in Microsoft Word to present the calculation equations. Chapter 12, Exercises: 28 The personnel director of Cander Machine Pro
1. The purpose of an operational definition is to: A. assign numerical values to variables B. specify how a variable will be defined and measured C. state the expected relationship between variables under investigation D. designate the overall plan by which research will be conducted 2. The independent variable (s) in
(1) Test the given claim using the traditional method of hypothesis testing. Assume that the sample has been randomly selected from a population with a normal distribution. Show a complete hypothesis test with all six steps. A public bus company official claims that the mean waiting time for bus number 14 during peak hou
According to 1972 article in a national newspaper the starting salaries at a certain national bank showed that on average males were paid more than females. The results are based on a random sample of males and females starting at this bank. a) Can we conclude that the starting salary for males are higher than for females at
(see attached) A sample of 200 observations from the population indicated that X1 is 170. A sample of 150 observations from the second population revealed X2 to be 110. Use the .05 significance level to test the hypothesis. A. state the decision rule B. compute the pooled proportion C. compu
As part of a study of corporate employees, the Director of Human Resources for PNC, Inc. wants to compare the distance traveled to work by employees at their office in downtown Cincinnati with the distance for those in downtown Pittsburgh. A sample of 35 Cincinnati employees showed they travel a mean of 370 miles per month, with
1) If a null hypothesis is rejected with a significance level of 0.05, is it also rejected with a significance level of 0.01? Why or why not? 2) You are the quality control manager at Mars, Inc and you want to prove the company's claim that 10% of all M & M candies are blue. Is it possible to prove that claim using methods of
Discuss the classical experiment design and its relationship to causality. Please include references.
I need the null hypothesis and the alternate. I also need the test statistic so I can calculate the problem. --- The management of white Industries is considering a new method of assembling its three-wheel golf cart. The present method requires 42.3 minutes on the average to assemble a cart. The new method was introduce
I need the test statistic I should use and the null and alternate hypothesis for the three problems below. I can calculate the problems I just need help getting started. 1. Beef patties for McDonalds are prepared and packages at a processing plant and shipped frozen to the individual outlets. From past experience, it is
1) In a Gallup survey, 1087 randomly selected adults were asked "Do you have occasion to use alcoholic beverages such as liquor, wine, or beer, or are you a total abstainer?" Sixty-two percent of the subjects said that they used alcoholic beverages. Consider a hypothesis test that uses a 0.05 significance level to test the cla
This is a synopsis of a peer-reviewed reading, article that utilizes statistics to solve the business related problem. The synopsis should include a discussion of the specific problem. Also include the research methodology used, the quantitative and qualitative tools employed in the study, and the pros and cons of the study. Add
A mortgage department of a large bank is studying its recent loans. Of particular interest is how such factors as the value of the home (in thousands of dollars), education level of the head of the household, age of the head of the household, current monthly mortgage payment (in dollars), and gender of the head of the househo
Please look at the junk food dollar amounts for men and women and children and perform a hypothesis test to find out if there is a difference in junk food spending between all three groups. Use ANOVA. (Use level of significance .05) (See attached file for data)
1. Using rare event rule and subjective estimates to determine whether events are likely. Claim: People born on February 29 have IQ scores that vary less than the general population for which the sigma = 15, and a random sample of 50 people born on February 29 results in IQ scores with s= 14.99. 2. Identify H0 and H1 in symbo
A study of recent graduates revealed that for a sample of ten accounting majors the mean salary was $30,000 per year with a sample standard deviation of $2,000. A sample of eight general business majors revealed a mean salary of $29,000 per year with a standard deviation of $1,500. At the .05 significance level can we conclude a
Why is a t-statistic, as opposed to a z-statistic, used to test small populations? When does the t-statistic approximate the z-statistic?
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 Crosset's
A synopsis of a business related problem where statistics was used to solve the problem. The synopsis needs to include a discussion of the specific problem, the research methodology used, the quantitative and qualitative tools used, and the benefit and limitations of the resolutions used.
A recent article in the Wall Street Journal reported that the 30-year mortgage rate is now less than 6 percent. A sample of eight small banks in the Midwest revealed the following 30-year rates (in percent): 4.8 5.3 6.5 4.8 6.1 5.8 6.2 5.6 At the .01 significance level, can we conclude that the 30-year mortgage rate for sm
(See attached files for full problem description) --- 1. Case Analysis: Riverside Chamber of Commerce Introduction All case studies address the following points: a. Define the problem statement b. Define any and all assumptions made to address the case study c. Analyze the data utilizing concepts and knowledge relevant
1 The U.S. Fish and Wildlife Service's report on the bass population in the North American lakes indicated average weight of the fish to be 3.0 lb. and a standard deviation of .30 lb. Furthermore, 50% of all bass were females. The State of Florida conducted an independent study and reported the average weight of their bass wa
A number of minor automobile accidents occur at various high-risk intersections in Teton County despite traffic lights. The Traffic Department claims that a modification in the type of light will reduce these accidents. The county commissioners have agreed to a proposed experiment. Eight intersections were chosen at random, and
Research at the University of Toledo indicates that 50 percent of the students change their major area of study after their first year in a program. A random sample of 100 students in the College of Business revealed that 48 had changed their major area of study after their first year of the program. Has there been a significant
(See attached files for full problem description)
Give an example of a hypothesis test you could perform at a Surgery Center and what the hypotheses would be. State the null and alternative hypotheses in proper format. Would you see this as a one time test or one that would be repeated on a regular basis?