In an effort to counteract student cheating, the professor of a large class created four versions of a midterm exam, distributing the four versions among the students in the class. After the exam, students from the class got together and petitioned to nullify the results on the grounds that the four versions were not equal in
Refer to the Baseball 2002 data, which reports information on the 30 Major League Baseball teams for the 2002 season. a. At the .10 significance level, is there a difference in the variation of the number of stolen bases among the teams that play their home games on natural grass versus on artificial turf? b. Create a vari
The solution gives five steps procedure for analysis of variance McBurger restaurants data in Excel.
There are four McBurger restaurants in the Columbus, Georgia, area. The numbers of burgers sold at the respective restaurants for each of the last six weeks are shown below. At the .05 significance level, is there a difference in the mean number sold among the four restaurants, when the factor of week is considered? a. Is the
For the time being, the air traffic control system in the United States is run by the federal government. Several groups disagree with this and would like to privatize the air traffic control system. Among the arguments given for privatization is that flight delays are much too common in the United States. A first step in decidi
Testing difference between the additives used to reduce pollution by chemical waste. One way ANOVA test is to be used to work out this problem. For complete description of the question, please see the actual question posted.
Three companies are attempting to sell you a pollution reduction additive to your chemical waste. Given limited resources, which prevents you from developing the additive yourself, you get each company to give you a sample to the product. You are able to use it on ten batches each. You use it on the same machines. The parameter
WidgeCorp became the market leader in snack foods after acquiring a rival company, Company W. Their management style and business decision-making differed. Employees at WidgeCorp collected relevant data and through statistical analysis used this information to draw conclusions and make appropriate recommendations. Company W tend
1. Increasing the number of scores in a sample from n = 10 to n = 20 will increase the width of a confidence interval to estimate the population mean. (Assume all other factors are held constant.) True False 2. An educational psychologist gives a group of third-grade students a reading test at the begi
I've pasted my SAS data below. If you need to use Stata or a similar program that is OK (but I would prefer SAS) 1. Write a model for this experiment 2. Conduct an analysis of variance 3. Compute the relative efficiency of the Latin square design relative to a completely randomized design. Interpret this value. Were the b
I have four categories, for instance, age, sex, zone and weight. I am asked if the average weight of the population differs among the four zones, and the sexes. I performed a one way anova test for weight and zones then another for weight and sex. Is this correct? I then performed a one way anova test of the zones versus age
The organization would like to determine if three of their territories are in fact meeting average profit margin expectations of 35% or if there is a variance depending on market region. Perform an ANOVA on the data presented in the attachment. 1) Please provide explanations during the steps 2) Show corresponding work
Enter the attached data given to you into an Excel spreadsheet, calculate the requested statistics, and answer the following questions. Data from Total Knee Replacement (TKR) patients was collected from 3 different clinics. The data that is given to you includes: Subject number, age, clinic and range of motion (ROM) measurem
An experiment is conducted to study the effects of two sales approaches - high-pressure (H) and low-pressure (L) - and to study the effects of two sales pitches (1 and 2) on the weekly sales of a product. The data (Results of the Sales Approach Experiment) in the attached table are obtained by using a completely randomized desig
Engineering Statistics 2.5 3.1 5.1 7.5 2.8 3.8 5.3 8.1 2 3 4.9 7.6 2.7 3.4 5.5 7.8 2.5 3.3 5.4 6.9 2.4 3.6 4.8
Please show me how to do problem 8.11 (I've scanned the page containing this problem). My instructor also wrote: *For part (a) use F.05 (2,90) < F.05(2,87) < F0.05 (2,60) *For part (b) t0.025 (87) = 2.2809 Of course that should really be "F- subscript - 0.05", etc but I couldn't use subscripts in this text box.
Response Time Type of Call 25.22 Fee Refund 25.01 Fee Refund 25.1 Fee Refund 24.89 Fee Refund Question 25.23 Missing Deposit Does the type of call affect the response time of the call center? 24.97 Missing Deposit Is it statistically significant? 25.07 Missing Deposit 24.81 Missing Deposit 25.18 Copy of a
In a class of 100 students, the grades by gender are shown below: A B C D F Row Total Men 7 14 28 14 7 70 Women 8 6 7 6 3 30 Column Total 15 20 35 20 10 100 Can you conclude at a 95% confidence that the grade is independent of gender? An experiment was conducted to compare the effectiveness of three
The literary styles of different authors can vary widely. In particular, one factor that may differ is the word length of sentences. Here are two (fiction) novels of reasonable length, written in English and by two different authors. Novel 1: Memoirs of a Geisha by Arthur Golden. Novel 2: The Pact by Jodi Picoult. To get
At 0.05 level of significance, is there a difference in the mean numbers of SUVs sold at the three metropolitan areas?
A new model of SUV is marketed in three major metropolitan areas. The number of vehicles sold every month at each of three store chains is listed below. Chicago Houston Miami 307 324 110 500 442 193 690 270 138 448 199 244 At 0.05 level of significance, is there a difference in
ANOVA & Students t Test for traffic and stress data. Null Hypothesis, Alternative Hypothesis, Significance Level, Critical Value, P value.
29. Samples were selected from three populations. The data obtained follow. Sample 1 Sample 2 Sample 3 93 77 88 98 87
The researcher wants to determine whether there is a relation between the type of residence owned and the level of the family income. He randomly sampled 100 homeowners and obtained the following data: Income Level Condo Townhouse Single Family Home up to 30K 15 9 3 30K-60K 9 7 7 60K-100 K
Here is the problem and I need help I am in a group and no one is helping me. I have talked to the teacher and now i have to do it by myself and turn in the assignment. I have struggling bad in this class. PLEASE HELP ME. In this regard, remember the goal will be to work through an ANOVA test to compare the means of three o
You are the engineer for a paint process. You'd like to improve the quality of the process. You have selected your response variable, which is ppm of dust. You have sixteen measurements that you take, you have 3 variables [resist thickness, develop time, and exposure]. You have two levels of each of the variables [say, lev
Critical Range for Tukey-Kramer. See attached file for full problem description. Answer The null hypothesis tested is H0: There is no significant difference in the population mean of downhill coasting speed of 4 brands of bi cycles Here one way ANOVA can be used as there is only one categorical variable b). ANOVA
Professor Brunner had students in his Marketing class rate his performance as Excellent, Good, Fair, or Poor. A graduate student collected the ratings and assured the students that Professor Brunner would not receive them until after the course grades had been submitted. The rating (the treatment) a student gave the professor wa
Earth Engineering is an environmental engineering consulting firm with more than 50 offices nationwide. Within the state of Texas, there are 5 offices; however, the focus of this problem resides with the office located in Austin. The Austin office currently houses 54 employees; however, the original office space of 10,000 square
Scenario: Surging Fuel Prices Situation: ABC Trucking Company purchased 15 trucks at the same time to start their business. 5 Trucks were purchased from Peterbilt, 5 from Freightliner, and 5 from Kenworth. All the trucks are used for long distance hauling. The cost of fuel for the first year is shown. Is there a significant
The president of a new car dealership professional association wishes to study the number of hours department heads spend on the floor of their shops weekly by department. The manager selected a sample of five department heads from each of three shops from among area dealerships. At the .05 significance level, can she conclude
1. What is the Null Hypothesis in the ANOVA test? The Alternate Hypothesis? Discuss. 2. What is the difference between a One-Way ANOVA and a Two-Way ANOVA? When do you use each?
1. What is meant by within group variance? Between group variance? How does the ANOVA procedure use these concepts? 2. What are the 6 steps to the ANOVA hypothesis test?
Conduct and interpret the appropriate analysis to determine the effect of the different teaching methods on ability to communicate.
Suppose you are interested in whether or not fluency with the English language is affected by the teaching method. You are working with a school system that has a large population of children for whom English is their second language. This school system is open to trying new teaching methods, so you set up a study where Classr