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    Descriptive Statistics

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    Calculating descriptive statistics

    The following sample was obtained from a population with unknown parameters: Scores 1,5,1,1 a) Compute the sample mean and standard deviation b) Compute the standard error of the mean

    Fundamentals of Statistics: AIU Job Satisfaction Data Set

    See attached data set file. The data set for our course is a sample of a survey conducted on the population of the American Intellectual Union (AIU). It is available via the following link: DataSet with DataSet Key which contains the following nine sections of data that will be used throughout our course: (1) Gender (2) Ag

    Statistical Analysis of Job Satisfaction Survey Data and Interpetation of Results

    The data set for our course is a sample of a survey conducted on the population of the American Intellectual Union (AIU). It is available via the following link: DataSet with DataSet Key which contains the following nine sections of data that will be used throughout our course: (1) Gender (2) Age (3) Department (4) Position

    Statistical Data Analysis using Excel

    See attached file. Assume you are researching about housing in a neighborhood encompassed by 5 townships in the attached Real Estate Data Set (Excel). Evaluate if the distance from center of town the homes are located creates a positive, negative or neutral change in the price of the home. Data analysis using descriptive

    Mean calculation for 50 executives laid off from previous positions

    A recent survey of 50 executives who were laid off from their previous position revealed it took a mean of 26 weeks for them to find another position. The standard deviation of the sample was 6.2 weeks. Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks?

    Various Calculations Given Time Series of IBM Stock Prices

    1. Download time series of daily and monthly prices for IBM for 1963-2009. 2. Compute the sample mean, median, variance, skewness, kurtosis, min, and max for continuously compounded, i) daily and ii) monthly returns. Compare the same for simple returns. a. Are there any differences in skewness of daily and monthly returns?

    General Aviation: plot data, discuss pattern, fitted trend, forecast

    Instruction: ? a) Plot the data ? b) Discuss the pattern and possible causes ? c) Would a fitted trend be helpful? ? d) Does 1992-2003 graph suggest fitted trend can predict 2004? ? e) Fit a trend model to 1992-2004 data ? f) Make a forecast for 2004 ? g) Why is it best to ignore earlier data? The t

    Decision analysis: Maximax and Maximin

    The owner of the Burger Doodle Resturant is considering two ways to expand operation: open a drive-up window or serve breakfast. Th increase in profits reulting from theise proposed expansions depend on weather a competitor opens franchise down the street. The possible profits form each expansioin in operations, give both fu

    Statistics - Basic Analysis - SPSS

    The first part of this Application is your analysis using SPSS. To conduct your quantitative analysis, use your course text, (a) Selecting appropriate variables based on type (nominal, ordinal, or scale), calculate descriptive statistics. At the very least, calculate a mean, median, and standard deviation. Be sure to save

    X-bar and R-bar Charts for a Manufacturing Process

    A new machine has just been installed to cut and rough-shape large slugs. The slugs are then transferred to a precision grinder. One of the critical measurements is the outside diameter. The quality control inspector randomly selected five slugs each hour, measured the outside diameter, and recorded dthe results. The measurement

    Using Descriptive Statistics in the Work Place

    Can you give me a brief example of how I can routinely use descriptive statistics in the work place. Include a description of work, the way in which I could calculate the statistics and how the statistics are used in a work.

    Descriptive Statistics

    A new machine has just been installed to cut and rough-shape large slugs. The slugs are then transferred to a precision grinder. One of the critical measurements is the outside diameter. The quality control inspector randomly selected five slugs each hour, measured the outside diameter, and recorded the results. The measurements

    Level of measurement and validity

    What is an example of data that can be transformed from one level of measurement to another, and another example of data that cannot be transformed? And why is validity for measurement so difficult to establish?

    Descriptive Statistics Frequency Distribution and Histogram

    In a study of job satisfaction, a series of tests were administered to 50 participants. The following data were obtained; higher scores represent greater dissatisfaction: Use the data of this question to calculate the following: 1. Frequency dist. 2. Relative frequency dist. 3. Cumulative frequency dist. 4. Histogram

    Analysis of Variance and SS Between

    An analysis of variance produces SSwithin = 40 and SStotal = 70. In this analysis, what is the value of SSbetwen? A. 30 B. cannot be determined without additional information C. 40 D. 110

    Descriptive Statistics & Hypothesis Testing: Lunch Break

    See attached file. The Bureau of Finance has always has always been a relaxed place to work. Employees are allowed a 60 minute lunch break and not required to punch in and out. Recently, the head of the Bureau has come to suspect employees are taking advantage by taking more than 60 minutes. He decides to check and collects t

    Descriptive Statistics for Dry Cleanings

    The number of dry cleaning orders picked up at Sunny Fresh Dry Cleaners was sampled over 4 hour periods. Below is the sample: 61 58 67 52 25 64 38 49 51 61 58 61 27 61 58 34 From this data set, compute the sample mean, median, mode and midrange. Compute the 1st quartile and 3rd and

    Develop and Define a Model for the Total Amount of Money

    Develop a model that will determine the total amount of money you will have in the account at: The end of first year; If you deposit $5000 in a saving account that pays 3% annual interest. (Also, define all of the model components).

    Simplex Procedure

    See the attached file. The Dreskin Development Company is building two apartment complexes. It must decide how many units to construct in each complex subject to labor and material constraints. The profit generated for each apartment in the first complex is estimated at $900, for each apartment in the second complex, $1,500.

    Simplex method for profits at the Roller Products Company

    The Roller Products Company produces roller skates and skateboards. It has three production lines. Production line 1 makes skateboard platforms. Production line 2 makes skate assemblies. Production line 3 mounts wheels on both products. The marketing department has determined virtually unlimited demand for both products. Profit

    Statistics - Descriptive Summary measures

    4.21,5.55,3.02,5.13,4.77,2.34,3.54,3.20,4.50,6.10,.38,5.12,6.46,6.19,3.79,15.08 a. What descriptive summary measures would you use to present the data. which measure is the best to use and which is the worse and why? b. What conclusion can you draw about the data.

    Slope of the Equation Line

    (a) Make a scatter plot of the data. What does it suggest about the correlation between X and Y? (b) Use Excel, MegaStat, or MINITAB to calculate the correlation coefficient. Also calculate the slope of the equation line. 12.4 Moviegoer Spending ($) on Snacks Movies Age (X) Spent (Y) 30 2.85 50 6.50 34 1.50 12