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# Hypothesis Testing

### Statistical analysis: Hypothesis Testing

Use the traditional method of hypothesis testing unless otherwise specified 1. A traffic safety expert report indicated that 21-24 years age group, 31.58% of traffic fatalities were victims who had used a seat belt. Victims who were not wearing a seat belt accounted for 59.83% of the deaths, and the status of the rest was unk

### Advertising and price as determinants of sales

Sam Smith, owner and general manager of Campus Stationery Store, is concerned about the sales behavior of a scanner at the store. He understands that there may be many factors, which may help explain sales, but he believes that advertising and price are major determinants of sales. Sam collects the data given below with: Y = SA

### Null & Alternative Hypotheses: Retail Prices

The R.R. Bowker Company of New York collects information on the retail prices of collectible children's books and publishes its findings in Publisher's Weekly. Last year, the mean retail of collectible children's books was \$35.44. A random sample of 40 collectible children's books (published this year) is selected, the retail

### Supporting Hypothesis Testing and Establishing Probabilities

See the attached file. Discuss how the following supports hypothesis testing and establishing probabilities using the attached Excel chart. 1) The use and functionality of Excel software. 2) Review the report of the stats for the NCAA 2008 champions Kansas Jayhawks (basketball team). The hypothesis stated as "are the

### PhoneEx Statistical Analysis

1.Provide an example of an experiment or data that has two factors. Provide details (what is being measured and the number of levels) of the levels for factor A and factor B. 2. PhoneEx provides call center services for many different companies. A large increase in its business has made it necessary to establish a new call ce

### Hypothesis Testing and Biostatistics

Part 1 7.109 Suppose we wish to test the hypothesis H0: μ = 2 vs. H1: μ ≠ 2. We find a two-sided p-value of .03 and a 95% CI for μ of (1.5, 4.0). Are these two results possibly compatible? Why or why not? Nutrition The mean ±1 sd of ln [calcium intake (mg)] among 25 females, 12 to 14 years of age, below the poverty

### Complete a research project and write a hypothesis about smoking

Based on the health promotion below, please tell me how to complete the research project and what hypothesis testing would be involved. Health Promotion A study is planned on the effects of a new health-education program promoting smoking cessation among heavy-smoking teenagers (20 cigarettes/equal to one pack per day). A r

### One-tailed test interpretations for three scenarios

Use the attached table to determine whether the correlations are significant and how you would interpret the results. a. The correlation between speed and strength for 20 women is 0.567. Test these results at the 0.01 level using a one-tailed test. b. The correlation between the number correct on a math test and the time i

### Basic Statistics Concepts and Hypothesis Testing

1. A mean score of 5.4 with SD of 1.6, where would 68% fall? a.between 3.8 and 7.0 or b.between 5.4 and 7.0? 2.Descriptive stats related to variabitity helps you evaluate what of a sample? a.the homogeneity or heterogeneity of the sample, b.the sampling error,c.the t test or d.meta analysis 3.is rating job satisfaction on 5 po

### Fisher's LSD approach and the posttest model

1. The Cordage Institute, based in Wayne, Pennsylvania, is an international association of manufacturers, producers, and resellers of cordage, rope, and twine. It is a not-for-profit corporation that reports on research concerning these products. Although natural fibers like manila, sisal, and cotton were once the predomonant ro

### Graphs and rationale

A research team conducted a study of soft- drink preferences among residents in a test market prior to an advertising campaign for a new cola product. Of the participants, 130 are teenagers and 130 are adults. The researchers secured the following results: Soft-drink..............Cola..............Non-cola Teenagers........

### Chi-Square with SPSS: gss04student Database, Race vs. Birth Defects

Can someone help me to condense the statistical results of the attached "Chi-square" done by the SPSS program? The test looks at: Is there a relationship between race and birth defects. I have included an example of how my I need to condensed the SPSS results paper in an APA format. I need help with answering the following quest

### Appropriate statistic tests

I have created the following hypothesis need help for approprate tests ( independant t test /correlation/regression/anova) and stating the hypothesis 1. What would you suggest to be the appropriate statistic tests to use and why ? 2. Any suggestions on stating the hypothesis in a more professional manner? This is what I

### Hypothesis and Defining Parameters

Exercises 12-15 thru 12-17. Textbook PDF's with questions omitted for copyright reasons. Refer to attachments for necessary data. Please begin each solution by stating or restating the problem, establishing parameters, establishing the hypothesis, defining parameters used, and ending with both the statistical decision and b

### SPSS Output on Regress Age on Height

Using the data collected in W1: Assignment 2, regress age on height using SPSS. Report your results in the APA format and write one to two sentences interpreting the results. Save the SPSS output. Write your interpretation in a Microsoft Word document. See the attached file.

### Mean difference and P value questions

See attached for data. 2. The table below provides data on the theoretical calculated and experimental test values of the vapor pressures for dibenzothiophene, a heterocyclloaromatic compound similar to those found in coal tar. If the theoretical model for vapor pressure is a good model of reality, the true mean difference be

### Scientific Methodology

What is the difference between qualitative and quantitative data? Provide an example of each type. What is a null and alternative hypothesis? What is a variable? What are independent and dependent variables? What is the difference between population and sample? When would you want to use a sample? How would you go a

### Statistics: Research Hypothesis

I need help with the following questions regarding the research hypothesis: (All data has already been entered onto attachment.) a) Identify and test the research hypothesis at the .05 level of significance that boys raise their hands in class more often than girls. Remember to first decide whether this is a one- or two-tail

### Statistics: Interpreting Different Results of Hypothesis Testing

I need help with the following question regarding the interpretation of hypothesis testing: A public health researcher tested the hypothesis that providing new car buyers with child safety seats will also act as an incentive for parents to take other measures to protect their children (such as driving more safely, child-proof

### T testing (edited)

1. Siegel found that elderly people who owned dogs were less likely to pay visits to their doctors after upsetting events than were those who didn't own pets. Similarly, consider the following hypothetical data. A sample of elderly dog owners is compared to a similar group (in terms of age and health) who do not own dogs. The re

### Linear Statistical Models and Hypothesis Testing

See attached document for data. 1. a) Find the sample correlation coefficient r between the league positions in 2008 and 2009. Test the null hypothesis that the population correlation coefficient p between the league positions in 2008 and 2009 is zero. b) Obtain an approximate 95% confidence interval for the population c

### Hypothesis Testing: The Effect of Television Violence on Blood Chemicals

A researcher studied the effect of television violence on concentration of a particular blood chemical. In this study, 40 participants were measured over a period of an hour prior to watching a violent show and then immediately after. In the results section, the researcher writes: "There was a significant decline in blood concen

### Sampling Methods and Hypothesis Testing

Please see the attached file for proper formatting. 10. A researcher wants to collect data about the study habits of sophomores at Harmond University. From the sophomore class of 2,300 students, she wants to collect a sample of 70 students. Which of the following sampling methods will yield the most representative sample

### Assessing Within Subject Effects

Please see the attached copy for the data. 1. Using the SPSS output attached, interpret the data in the table for the within-subjects effects. 2. Make sure to discuss the findings of the analysis in terms of what they actually mean in the context of the study (example given in the lecture for the effects of room temperature o

### Relationships between home teams and visiting teams

A sports statistician is interested in determining if there is a relationship between the number of home team and visiting team losses and different sports. A random sample of 526 games is selected and the results are given below. Test the claim that the number of home and visiting losses is independent of the sport. Use alpha =

### Intrepeting Research - Independent Samples t-Test With SPSS

My assignment requires me to do a practice comparison of the means of two sample populations related to one particular variable. Using SPSS, I elected to do my population samples about gender: Female vs. males. The research was about which gender amongst the population researched make the highest income. I am having trouble rea

### The Critical T-Value That Corresponds to 99% Confidence

Find the critical t-value that corresponds to 99% confidence (one tail) and n=10. Response includes a distribution plot attachment.

### Business Statistics: Vacation Occupancy Rates

Vacation occupancy rates were expected to be up during March 2008 in Myrtle Beach, SC. Data in the file Occupancy will allow you to replicate the findings presented in the newspaper. The data show units rented and not rented for a random sample of vacation properties during the first week of March 2007 and 2008. 1) Estimate t

### Hypothesis Testing: Playbill Magazine

Given the following case scenario: In 2010, Playbill Magazine contacted Boos Allen to determine the mean annual household income of its readers. Using a list of customers provided by Playbill, Boos Allen randomly sampled 300 Playbill customers. From that sample, Boos Allen is confident that the population average Playbill rea

### Variety of Statistics Problems

I have attached a series of statistical problems. Please provide as much detail as possible. I want to double check my answers for each question. 1. A chain of health-food stores is determining the relationship between the number of times its commercial is broadcast on radio or television weekly and the weekly sales volume.