Chapter 3 & 4 Sample Problems Chapter 3 5. GFK Roper Consulting conducts a global consumer survey to help multinational companies understand different consumer attitudes throughout the world. In India, the researchers interviewd 1000 people aged 13-65 . Their sample is designed so that they get 5
Chapter 7 Sample Problems 41. A company has recently replaced their e-mail server because previously mail was interrupted on about 15% of workdays. To see how bad the situation was, calculate the probablity that during a 5-day work week, there would be an e-mail interruption. A) On Monday and again on Tuesday?
Hi, I need your expertise on the questions attached. I appreciate your help!
If the manager of a paint supply store wants to estimate the mean amount of paint in a 1-gallon can to within +/- 0.004 gallon with 95% confidence and also assumes that the standard deviation is 0.02 gallon, what sample size is needed? Please answer in excel using functions.
In a survey of 1200 social media users, 76% said okay to friend co-workers, but 56% said it is not okay to friend co-workers. (Data extracted from "Facebook Etiquette at work," USA Today, March 24, 2010, p.1B). a. Construct a 95% confidence interval estimate for population proportion of social media users who would say it is
Roper ASW conducted a survey to learn about American adults' attitudes toward money and happiness. 56% of the respondents said they balance their checkbook at least once a month. a. Suppose a sample of 400 American adults were taken. Show the sampling distribution of the proportion of adults who balance their checkbook at le
Your final project entails systematic extraction of decision-aiding insights from a dataset (SampleDataSet.xlsx) provided to you in the Doc Sharing area. The goal of this project is to provide you with hands-on experience in conducting and interpreting different types of statistical analysis. The focus of your analysis will be o
Alice wanted to examine the impact of family ownership on the valuation and/or performance of newspaper publishing companies in Hong Kong for her research project. She decided to download data from a publicly available database on the Internet and base her research entirely on secondary data. When browsing the Internet, Alice
The significant decline of savings in the United States from the 1970s and 1980s to the 1990s and 2000s has been widely discussed by economists (money.cnn.com, June 30, 2010). According to the Bureau of Economic Analysis, the savings rate of American households, defined as a percentage of the disposable personal income, was 4.20
1. Systolic blood pressure in different age groups The following table contains a random sample of 40 women partitioned into three groups: Group 1: ages below 20 Group 2: ages 20 through 40 Group 3: ages over 40 The values in the table are the systolic blood pressure levels The Hypothesis Test: H0: u1 = u2 = u3 H1: at
The first unit of a product took 832 hours to build, and the learning rate is 90%. How long will it take to make the 20th unit? Estimated labor requirements to build 20th unit =________________hours.
Describe a study you might design that could use the Chi Square statistic. What are the variables? What are the null and alternative hypotheses? Why would the Chi Square test be appropriate for this design? What would the Chi Square statistic indicate in relation to your research question? What would it not indicate? Be specific
See the attached file(s). Questions: t-test for dependent groups 1. What are the two groups whose results are reflected by the t ratios in Tables 2 and 3? 2. Which t ratio in Table 2 represents the greatest relative or standardized difference between the pretest and 3 months outcomes? Is this t ratio statistically signi
Explain/discuss each pitfall and how it might impact good problem solving in the business environment. 1. Making conclusions about a large population from a small sample 2. Making conclusions from nonrandom samples 3. Attaching importance to rare observations 4. Using poor survey methods
Would you please explain to me the difference between data collection methods and Data Sources? -Please site examples from the attached article? -What were the data collection methods used in the article? -What were the data sources used in the article? -What are the threats to the collection methods used? -What are th
1) An oil change shop advertised to change oil within 20 minutes. Based on the data collected on five days of work, what is the probability that oil change will take less than 20 minutes? Based on the data, do you think the business claim is valid? Explain why or why not. If not, what advertising claim could you make based upon
Practical Application Scenario 1 You are the manager of the Gander Mountain store in Frogtown, Illinois. Recently, a customer mentioned that they believed your prices for ammunition were lower than the prices of Gander's primary competitor in the hunting equipment market, Cabela's. You would like to be able to include that stat
Find three research studies of interest to you that provide proper usage of the one-way, repeated measures, and factorial ANOVA. State the null hypothesis that was tested in each study. Interpret the F statistic for each study and make a determination regarding the null hypothesis (reject or fail to reject). Comment further o
Measure of central tendency and dispersion allow researchers to analyze data more effectively. A quick serve restaurant chain commissioned a research study on the introduction of a new salad product. The survey asked the respondent for an assessment of the new salad. The questions included a rating from 0 (lowest) to 10 (highest
Below are a list of questions that I find particularly interesting to get some basic fundamentals down. There does not need to be much detail into any of these questions, just enough information to suffice the question (i.e. maybe a couple of sentences or key points). What is an ANOVA? Why is it called ANOVA (Explain the bas
Download the Excel file for HW3, which contains two sets of data for two variables. 1. For the first set of paired data (sheet 1): a) Make a scatterplot of the data. b) Use Excel functions to find the means and standard deviations of each variable. c) Working in Excel, calculate the correlation coefficient (r) by cr
Please help with type/s of analysis and power analysis. I am thinking ANOVA and Pearson's target population 60 nursing students (40 from the BSN program and 20 from the ASN program) Research Questions: Compare BSN students who have lecture to those who do not receive lecture on safety Compare ASN students who have lecture t
Statistical Calculations 1. Use the data in the table below to 1. Prepare a frequency distribution of the respondents' ages 2. Cross-tabulate the respondents' genders with cola preference 3. Identify any outliers 2. Data on the average size of soda (in ounces) at all 30 major league baseball parks are as follows: 14
I need quick help with this problem and Excel SOLVER setup. I would like someone to review this, fix the solver issues and explain this problems outcome. Linear Optimization Model: Klein Industries manufactures three types of portable air compressors: small, medium, and large, which have unit profits of $20.50, $34.00, and
Data was collected in a clinical trial evaluating a new compound designed to improve wound healing in trauma patients. The new compound was compared against a placebo. After treatment for 5 days with the new compound or placebo, the extent of wound healing was measured and the data are shown in the table below. Suppose that clin
If the multiple coefficient of determination that relates x3 to all the other independent variables, R2(x3) = .8, calculate the variance inflation factor for x3. Should the analyst be concerned about multicollinearity? Why?
Independent random samples from approximately normal populations produced the results shown below. Complete parts a and b. Sample 1: 42, 29, 38, 37, 40, 40, 22, 39, 57, 55 Sample 2: 70, 55, 50, 54, 52, 23, 30, 30, 43, 61 a. Do the data present sufficient evidence to conclude that u1 - u2 does not equal 0? Use alpha = 0.
1. A brand name has 80% recognition rate. If the owner of the brand wants to verify that rate beginning with a small sample of 15 randomly selected consumers, find the probability that exactly 12 of the 15 consumers recognize the brand name. Also find the probability that the number who recognize the brand name is not 12. The p
1. Determine whether the description corresponds to an observational study or an experiment. Forty patients with skin cancer are divided into two groups. One group an experimental drug to fight cancer, the other a placebo. After two years, the spread of the cancer is measured. Does the description correspond to an observatio
Compute the mean, median, and mode for the following three sets of scores. Do it by hand or using Excel. Show your work. Score 1 Score 2 Score 3 3 34 154 7 54 167 5 17 132 4