A corporate CEO reviews the earnings of three divisions over the last eighteen months. Each division reports its earnings quarterly. Based on the earnings below, is there sufficient evidence to conclude, at the 99% level of confidence, that one of these divisions is more profitable than the others? Division I Divis
A researcher looks at the effect of 3 different drugs on 3 different groups of 10 people. Numbers refer to stress levels, with lower numbers being lower stress. Drug 1 Before After 25 18 23 20 27 19 27 22 21 17 30 18 22 15 20 19 25 17 29 20 Drug 2 Before After 26 2
The following problems need to be worked and show work. If you report the output please, if not, just give solution to problems. OTA106049 4. A researcher has constructed an 80% confidence interval of ... a. What would happen to the width of the interval if the researcher had used a larger sample size? (Assume other factors ar
The following summary table presents the results from an ANOVA comparing three treatment conditions with n = 12 participants in each condition. Complete all missing values. (Hint: Start with the df column). Source SS df MS Between Treatments ___ ____ 9
One possible explanation for why some birds migrate and others maintain year round residency in a single location is intelligence. Specifically, birds with small brains relative to their body size are simply not smart enough to find food during the winter and must migrate to warmer climates where food is easily available (Sol, L
ANOVA Analysis Please provide detailed information and answer each instance. Bring to mind a real-world situation or problem that could be addressed using a one-way analysis of variance (ANOVA). For this situation or problem: 1. Clearly identify the independent and dependent variables you would study, including the n
The following data are from an experiment comparing three conditions with a separate sample of n = 4 in each treatment. a. Use an ANOVA with ? = .05 to determine whether there are any significant difference among the three treatments. b. Compute ?2 foe these data. Treatment __________________________________
These will require using SPSS. The Howell Data set is attached: 1. Open the Howell data set in SPSS. Using the hypothesis testing procedure select any appropriate independent and any appropriate dependent variable from the Howell data set. Using the variables perform an independent-samples t test in SPSS, and generate syntax
PROBLEM-1: Two-Sample HypothesisTest for Proportion Two movies were screen-tested at two different samples of theaters. Mystic River was viewed at 80 theatres and was considered a success in terms of box office sales in 60 of these theaters. Swimming Pool was viewed at a random sample of 100 theaters and was considered a suc
15) Consider the Midcity Pricing Structure case we discussed. We would like to study how the selling price of properties varies by neighborhood (recall that there were three neighborhoods). As such, the output from doing an ANOVA on the data set with respect to neighborhood yields the following: ANOVA Summary Total Sa
I need to know how to calculate this by using TI84 or minitab: A study was conducted in which a random sample of 24 HS students was asked to give their grade point average (GPA). The block design below shows the GPAs of male and female and students from four different age groups. Use technology tool and the block design to
Solve for the following problem as well as write the results and present it as well as you would do for publication. Present any revelant data in SPSS. First-born children tend to develop language skills faster than their younger siblings. One possible explanation for this phenomenon is that first-borns have undivided attenti
A marketing analyst for a major shoe manufacturer is considering the development of a new brand of running shoes. The marketing analyst wants to determine which variables can be used in predicting durability (or effect of long-term impact). Two independent variables are to be considered, X1 (FOREIMP), a measurement of the forefo
Given the following number of hours between breakdowns for 4 machines, are the machines significantly different? If so, how are they different? Which machine is the best? Which machine is the worst? You are to perform a thorough and complete analysis of the data. Use alpha = .05 for all tests. Machine 1 Machine 2 Machine 3 M
What is the difference in calculation between ANOVA and Repeated Measures ANOVA?
Samples of pages were randomly selected from the same three books. The mean number of words per sentence was computed for each page, and the analysis of variance results from Minitab are attached. Using a 0.05 significance level, test the claim that the three books have the same mean number of words per sentence. (i) H0:
See the attached data file. Please see attached data. Given that the three sample means are 132.7, 134.4, and 138.1, can we use analysis of variance to conclude that the mean skull breadth from 150 AD is different from the means in 400 BC and 1850 BC? Why or why not? (i) [Answer the first question.] (ii) [Answer the sec
Question 1 [Refer to the file Q1.xls for the data] a) Test the null hypothesis that six samples of word counts for males (columns 1, 3, 5, 7, 9, 11) are from populations with the same mean. Print the results and write a brief summary of your calculations b) Test the null hypothesis that the six samples of word counts fo
You have 3 groups that you are trying to find if there is a difference in any of the population means. In each group there are 5 observations. The given level of significance is an alpha of .05. Your MSA is 5,500 and your MSW is 1,000. Will you reject your null hypothesis that all population means are equal or will you not rejec
Car Emissions: Listed below are measured amounts of greenhouse gas emissions from cars in three different categories. The measurements are in tons per year, expressed as CO2 equivalents. Use a 0.05 significance level to test the claim that the different car categories have the same mean amount of greenhouse gas emissions. 4-
#12, 641 Femur Injury in a Car Crash - Listed below are head injury data from crash test dummies. These measurements are in hic, which denotes a standard head injury criterion. Use a 0.05 significance level to test the null hypothesis that the different car categories have the same mean. Small Cars: 290, 406, 371, 544, 37
In this module of your SLP, you will continue your literature review regarding your chosen topic, and you will locate in particular one article that uses inferential statistical procedures that were overviewed in this module (that is, a dependent or independent t-test or ANOVA.) You will describe the study identifying: (a)
The following data were obtained from an independent-measures research study comparing three treatment conditions. Use an ANOVA with α = .05 to determine whether there are any significant mean difference among the treatments. Treatment I ` II III 2 5 7 N=14 5 2 3 G=42 0 1 6 ∑X2=182 1 2 4 2
Unit 4 Test 1. Find the critical value Chi-square (0.99) associated with a Chi-square curve with 10 degrees of freedom. 2. Find the critical value having an area of 0.05 to its right for an F-curve with 8 numerator degrees of freedom and 15 denominator degrees of freedom. 3. A random sample of 100 adults was recently gath
See data file attached. A Model of Socio-Economic Differences: Housing the Ultra -poor in Haiti The following study was developed by Economist Simon Fass. Fass surveyed a sample population of low-income households in St. Martin. The variables analyzed were monthly income per adult and choice of rental contract for housing.
The Texas Transportation Institute at Texas A&M University conducted a survey to determine the # of hours per year drivers waste sitting in traffic. Assume the sample data for six drivers in each of the these cities show the following # of hours wasted per year sitting in traffic. Denver Miami San Francisco 70
See data file attached. Directions: You may include the statistical software output, but you must also include a well-written explanation of the findings. Be sure to answer the question asked in each problem, and explain why, with reference to your output. If you calculate the answers manually, be sure to show your work. I
1. Bay Area University enrolls MBA students in three cohort programs: Weeknight, Saturday, and Distance. Dean Ed Epstein wants to know if there is a difference in the average of the students in the three programs. He has his assistant take a random sample of 5 students from each program and record their ages. Weeknight Sat
To compare lumen output of 3 different brands of light bulbs, 8 light bulbs of each brand were randomly selected and tested. The sums of squares were computed as SSTr = 591.2, SST =5364.5. (a) State the null and alternative hypotheses for the ANOVA (include definitions of parameters). What assumptions do we need to proceed w
Please see 2 files attached STATS 2 Using the database provided (finalll.doc), calculate three different statistical tests chosen from the following: 1. Unpaired t-test 2. Paired t-test 3. One way ANOVA 4. Two - way ANOVA If your database was constructed according to the directions, it should be appropriate for ap