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    Descriptive Statistics

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    Statistics -savings rates in the US

    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

    Finding the Labor Hours in the Given Case

    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.

    The solution gives detailed discussion on a study using Chi Square test.

    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

    T-Test for Dependent Groups

    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

    Statistics Pitfalls

    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

    Data Collection Methods Vs Data Sources

    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

    Five Statistics Probability Questions

    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

    Identifying Hypotheses and Statistical Analyses

    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

    Proper usage of the one-way, repeated measures, and factorial ANOVA

    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

    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

    Discussion on ANOVA, t test and F test

    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

    Using Excel to calculate descriptive statistics

    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

    Power Analysis and type of quantitative test

    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

    Simple statistical calculations

    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

    Linear Optimization Model Problem

    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

    Generating 95% Confidence Intervals

    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

    Statistical Analysis for a Random Sample

    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.

    Probability, Normal Distribution, Binomial Probabilities

    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

    Solving Multiple Questions on Descriptive Statistics

    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

    Various Statistical Situations

    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

    Chi-Square Analysis: Sex vs. Year of College

    Can you help with this sample question...Please end the solution in a doc file so I can open it..also could you send the minitab solution as well it helps me to follow...Thanks Conduct a chi-square analysis to determine whether sex and the year in college are related. Report your results in APA format and write one to two sen

    Logistic Multiple Regression Analysis Using SPSS

    Thank you for your hard work on this - here is a note from a friend who is working on the same issue - he is referring to the SPSS input: The correct analysis was to run a hierarchical logistic regression entering perceive, safety and gender in the first block and previous, selfcon and sexexp in a second. I used forced entry

    Statistics: Probability with a Roulette Wheel and Population Data

    Question: A roulette wheel has 38 slots, numbered 0, 00, and 1 to 36. The slots 0 and 00 are colored green, 18 of the others are red, and 18 are black. The dealer spins the wheel and at the same time rolls a small ball along the wheel in the opposite direction. The wheel is carefully balanced so that the ball is equally likely

    Graduating with Debt

    University %w/debt amount$ College %w/debt amount% Pace 72 32,980 Wartbug 83 28,758 Iowa State 69 32,130 Morehouse 94 27,000 Mass. 55 11,227 Wellesley

    Methods and Random Variables

    Consider the experiment of tossing a coin twice. 1. List the experimental outcomes. 2. Define a random variable threat that represents the number of heads occurring on the two tosses. 3. Show what value the random variable would assume for each of the experimental outcomes. 4. Is the random variable discreet or continuous?

    Stats: Normal Distributions, Sample Means, and Null Hypotheses

    1. To test Ho: μ=20 versus H1: μ<20, random sample size n=12 is obtained from a population that is known to be normally distributed with σ=2. a. If the sample mean is determined to be 18.3, compute P-value. b. If the researcher decides to test this hypothesis at the a=0.05 level of significance, will the researcher rejec

    Higher Levels of Stress and Lower Levels of Confidence

    Can you help with this sample question and send the solution in a doc file so I can open it.... For this assignment, use the data This week, you will explore the hypothesis that higher levels of stress are associated with lower levels of confidence. Compute the correlation between the stress score and confidence scores