A real estate agent in the coastal area of Georgia wants to compare the variation in the selling price of homes on the oceanfront with those one to three blocks from the ocean. A sample of 21 oceanfront homes sold within the last year revealed the standard deviation of the selling prices was $45,600. A sample of 18 homes, also s
Instructions: For each data set: (a) State the hypotheses. (b) Use Excel's Tools > Data Analysis (or MegaStat or MINITAB) to perform the two-factor ANOVA with replication, using α = .05. (c) State your conclusions about the main effects and interaction effects. (d) Interpret the p-values carefully. (e) Create interaction pl
Most of these should be answered in 1?3 sentences. 1. There are three uses for statistics. One of them is lying. What are the two legitimate fundamental uses for statistics. 2. Why is the mean the most useful estimator for a set of dependent variables? 3. What is the averaged Sum of Squares for a set of dependent vari
The following data were collected from a repeated-measures study. Use an ANOVA with an alpha = .05 to evaluate the mean difference between treatments. Treatment A B 2 6 2 6 G = 28 4
1. In a one-way ANOVA, there are three treatments with n1 = 6, n2 = 6 and n3 = 5. The rejection region for this test at the 5% level of significance is A. F > 4.86 B. F > 3.74 C. F > 4.97 D. F > 3.81 2. The following data show samples of three chain stores in three different locations in one town and the amount of doll
1. In a one-way ANOVA, there are three treatments with n1 = 6, n2 = 6 and n3 = 5. The rejection region for this test at the 5% level of significance is: A. F > 4.86 B. F > 3.74 C. F > 4.97 D. F > 3.81 2. The following data show samples of three chain stores in three different locations in one town and the amount of doll
ANOVA: Mean squares and the common population variance At LLD Records, some of the market research of college students is done during promotions on college campuses, while other market research of college students is done through anonymous mail, phone, internet, and record store questionnaires. In all cases, for each new CD th
Emma's On-the-Go, a large convenience store, has to decide where in the store to put its magazine rack. The manager at Emma's experiments with a selection of different locations, choosing a sample of days at each location. Each day, the manager records the amount of money brought in from the sale of magazines. It's possible t
Complete the following ANOVA table with H₀: μA = μB= μC = μD= μE= μF An incomplete ANOVA table is shown below: Source Treatment SS 100 df A. MS B. F Statistic F. Error C D E Total 240 40 Complete the table with the correct numerical value. (i) A.________________________________
For the following questions, decide whether the statement makes sense (or is clearly true) or does not make sense (or is clearly false). Explain clearly. Not all of these statements have definitive answers, so your explanation is more important than your chosen answer. A. In a test for equality of the mean ages of audience
Please answer the following question in detail. I would like to understand how you arrived at your conclusion. A random sample of 40 women in partitioned into 3 categories with ages of below 20, 20 through 40, and over 40. The analysis of variance results obtained from SPPS are shown below: Source Treatments SS
The owner of Happy Horses Farm owns four young race horses and wants to select the fastest to run in the Kentucky Derby. He designates three jockeys to ride the horses on four similar tracks at his large farm. Below are the times in seconds for riders and horses to run a simulated race. Horse 1 Horse 2
TRUE OR FALSE? 1. More variation should be expected between larger samples, which is apparent by the chi-square distribution. 2. A test of independence can be used to determine a cause-and-effect link between the variables being studied. 3. Using the F distribution for a one-way ANOVA, the degrees of freedom for the denominat
Compare the effectiveness of three methods of teaching (IV). You plan to administer a standardized test (DV measured on an interval scale measuring knowledge acquisition) to the students in three classes with each class using a different teaching method. What statistical test could I use and why? What is the best method
The waiting time (in minutes) for emergency room patients with non-life-threatening injuries was measured at four hospitals for all patients who arrived between 6:00 and 6:30 PM on a certain Wednesday. The results are shown below. Research question: Are the mean waiting times the same for emergency patients in these four hospit
A) Find the least square estimates for the unknown regression parameters and the estimate of the covariance matrix. Show all works. b) Fill-in the value for the ANOVA table. Show all works. c) Compute R2. Show all works. d) Is the X1 significant after X2 has been included in the model? Explain your answer and show all nec
When purchasing real estate a buyer may have a number of important features they need in a home. Total square footage, number of bedrooms, bathrooms, attic or basement may be requirements when purchasing a home. A real estate agent collects information from surrounding home sales and compares features to price homes according to
#1. In a study of brain protein PG3X, 12 patients are tested twice each day for 3 days to measure levels of PG3X. The scores below indicate levels of this protein. D1t1 D1t2 D2t1 D2t2 D3t1 D3t2 1) 42.00 58.00 47.00 68.00 46.00 63.00 2) 37.00 43.00 47.00 73.00 52.00 63.00 3) 32.00 58.00 27.00
Give a work example and perform a hypothetical 2 population hypothesis test. Discuss an application of ANOVA that might be undertaken in your workplace. What are the 3 or more treatments? What is the response variable? Create a scenario and do a hypothesis testing example for ANOVA. Give the result and explain what it m
Citrus Clean is a new all-purpose cleaner being test-marketed by placing displays in three different locations within various supermarkets. The number of 12-ounce bottles sold from each location within the super market is report below. Near Bread 18 14 19 17 Near Beer 12 18 10 16 Near Other Cleaners 26 28 30 32 At the .
An experiment was conducted to examine the effect of age on heart rate when an individual is subjected to a specific amount of exercise. Ten male subjects were randomly selected from four age groups: 10-19, 20-39, 40-59, and 60-69. Each subject walked a treadmill at a fixed grade for a period of 12 minutes and the increases in
1. Assume that the conclusion from an ANOVA is that the null hypothesis is rejected, in other words that the 9 population means (from equal sized samples) are not all equal. What should we expect? 2. Assume that the conclusion from an ANOVA is that the null hypothesis is rejected, in other words that the 6 population means
Two or More Sample Hypothesis Testing Paper Using numerical data from one of the 2005 Real Estate data set, develop one business research question (The research question is "ratio testing on the selling price (in thousands) compared to size of the home in square feet?") from which you will formulate a research hypothesis tha
A research organization tested microwave ovens. At alpha=.10, is there a significant difference in the average price of the three types of ovens? The data and an ANOVA table are shown below. Based on the ANOVA table is the null hypothesis of equal price rejected or not rejected? On what did you base your decision? Be sure to jus
What is the theory underlying ANOVA?
ANOVA Analysis of Variance (ANOVA) is used to test the equality of the means of three or more groups based on sample data. ANOVA is really a test of means even though it sounds like a test of variance. Building on the hypothesis testing techniques discussed on the first two weeks, ANOVA uses an F test (rather than a Z or t te
Describe, the following terms and give an example of each. a. Analysis of Variance b. One-way ANOVA c. Between-group variance d. Within-group variance e. Sum of squares between groups f. Sum of squares within groups g. Paired difference
The World Almanac and Book of Facts includes a section called "Noted Personalities" with subsections comprised of architects, artists, business leaders, cartoonists, social scientists, military leaders, philosophers,political leaders, scientists, writers, composers, entertainers, and others. Design and conduct an observational s
Why is the F distribution important? How do you determine if a significant difference exists among the groups in ANOVA? How do you determine differences between the groups in ANOVA?
Use the attached research proposal and create a presentation that provides the following information: a. Summary of research problem b. Summary of sampling or data collection techniques c. Summary of hypotheses tested for t-test and chi square analysis d. Graph of one of the research dependent variables e. A t-test and