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Descriptive Statistics

A test to measure depression

CASE STUDY Dr. Zak developed a test to measure depression. He sampled 100 university students to take his five item test. The group of students was comprised of 30 men and 70 women. In this group, four persons were African American, six persons were Hispanic, and one person was Asian. Zak's Miraculous Test of Depression is pr

Biostatistics Problems

I am not sure what to do and these are very hard. Please help me as I can use this as an tutorial. Attached is also the data information 6.56 Obtain descriptive statistics and graphic displays for these salt-taste indices. Do the indices appear to be normally distributed? Why or why not? Compute the sample mean for this ind

Quantitative graphs

2003 MLB Salaries by Team TEAM TOTAL PAYROLL AVG SALARY MEDIAN STD DEV New York Yankees $ 152,749,814 $ 5,455,350 $ 4,575,000 $ 4,781,135 New York Mets $ 117,176,429 $ 4,040,566 $ 1,300,000 $ 4,893,080 Atlanta Braves $ 106,243,667 $ 3,934,950 $ 800,000 $ 5,063,167 Los Angeles Dodgers $ 105,872,620 $ 4,072,023 $ 2,605,83

Identifying IV and DV for SPSS Program

I'm to compute a One-Way ANOVA with one IV, a nominal variable that has 3 or more levels and one DV, a Likert style or Ratio variable. I'm having trouble identifing a nominal variable that has 3 levels and DV, a Likert style or Ratio variable. I'm to use a code book but they all look the same to me. Sample from codebo

Likert scales Development Methods

Rensis Likert was the first to develop a method for measuring attitudes. He created survey items which were statements or questions, followed by an indication of agreement or support i.e. 5) strongly agree 4) somewhat agree 3) no opinion 2) slightly disagree 1) strongly disagree. Surveys using Likert scales are a common form of

Minimum-cost assignment of workers

Four projects must be completed, and each of four employees will be assigned to work on exactly one of the four projects. The table below presents an estimate of the cost that each employee would incur if working on the respective projects. What is the minimum-cost assignment of workers to projects? Table is attached.

Frequency Distribution and Standard Deviation

1. A company had 80 employees whose salaries are summarized in the frequency distribution below. Find the standard deviation. Find the standard deviation of the data summarized in the given frequency distribution. Salary Number of Employees 5,001 -10,000 14 10,001 - 15,000 13 15,001

Wholesales of Strawberries and Revenue Maximization

This season, a fruit wholesaler has 1000 lb of fresh strawberries for sale. Previous experience shows that demand is a function of the price it charges and is given by the following: Demand = 1000 - 150 * Price For instance, when the price is $1.00 per lb, the demand is equal to 1000 - 150*1 = 850 lb. Any left-over strawberr

Solving Statistics Questions

I am having a problem understanding these questions. I thought that maybe your assistance could help me understand this better. 1. In 1798, Henry Cavendish measured the density of the earth using an instrument called a torsion balance. While the density is obviously not uniform, the value of the mean density is important in d

Building a Frequency Distribution in Excel

Please help with the following statistics problems. For the following data: 15 25 13 10 9 17 13 15 20 5 1) Calculate the mean and standard deviation 2) Decide if it's a normal distribution 3) Build a frequency distribution

Using Statistics to Create a Managerial Report

Scenario: Metropolitan Research, Inc., a computer research organization, conducts surveys designed to evaluate a wide variety of products and services available to consumers. In one particular study, Metropolitan Research Inc. looked at consumer satisfaction with the performance of automobiles produced by a major Detroit manufac

Nominal, Ordinal, Interval or Ratio?

Please help me indicate which scale these questions should be classified as being assessed on - nominal, ordinal, interval, or ratio scale? 1. On a scale of one to seven, where one is extremely uninterested, and seven is very interested; what is your interest in this new idea? 1 2 3 4 5 6 7 2. Are these days durin

Calculating Variability and Percent

The box plots below show the real estate values of single values of single family homes in two neighboring cities, in thousands of dollars. Real estate values in neighboring communities Community Tiny town 60 85 110 Bi

Statistics: Interpretation of ANOVA results

Hi, I am having a hard time with these questions. The questions are as follows, 1. Using the SPSS Output given below, interpret the data in the table for the within-subjects effect, the between-subjects effect, and the interaction. 2. Make sure to discuss the findings of the analysis in terms of what they actually mean in th

Calculate the NPW for each of the given projects.

Two types of equipment are being considered by your company to improve productivity and quality in the manufacturing process. Details for each type of equipment is as follows: Equipment A: this equipment has an initial investment of $78,000 and the salvage value at the end of the six year service life is estimated to be $20,0

Descriptive Statistics and Probability Exercises

A survey conducted by the Northwestern University Lindquist-Endicot Report asked 320 companies about the procedures they use in hiring. Only 54 %% of the responding companies review the applicant's college transcript as part of the hiring process, and only 44% consider faculty references. Assume that these percentages are true

Working with Statistical Terms

Statistics Questions 1. Determine if this is an example of probability or statistics: More than half of all men surveyed preferred to watch college football over college basketball. 2. Determine if this data is qualitative or quantitative: Gender 3. Determine if this study is experimental or observational: Tests were c

Finding the Critical Path in a Problem

According to the data in the table, what is the critical path? Activity | Immediate Predecessor | Optimistic Time | Most Likely Time | Pessimistic Time A - 2 8 14 B -

Preparation of flexible budget for Logiclik.

Logiclik sells its main product, ergonomic mouse pads, for $11 each. Its variable cost is $5 per pad. For volumes up to 60,000 pads, fixed expenses are $200,000 per month. Above 60,000 pads, monthly fixed expenses are $250,000. Prepare a monthly flexible budget for the product, showing sales, variable expenses, fixed expenses,

Shipping Costs from Each of Two Regional Warehouses

The following table provides shipping costs from each of two regional warehouses to each of three destinations. The supplies available and the demands are also given in the table. FROM TO Houston New Orleans Atlanta Supply

Increase in Crime: Median Number of Crimes

The median number of crimes of a particular type in Sydney is 10 per week. However, in the first 26 weeks of 2012, there have already been 12 weeks in which more than 10 crimes of this type have been committed. Should the Leader of the Opposition demand the resignation of the Minister for Police because of an increase in this ty

Understanding the elements of a study

Please help me understand the concepts outlined below. I have to: - Construct a scale using the skills you have learned (What is meant by 'construct a scale' and what does a scale look like?) - Identify a construct (What are constructs and how in depth you you identify one?) - Operationally define your construct

Descriptive statistics

If you were given a large data set such as the sales over the last year of our top 1,000 customers, what might you be able to do with this data? What might be the benefits of describing the data?

Case Problem Alumni Giving

Alumni donations are an important source of revenue for colleges and universities. If administators could determine the factors that influence increases in the percentage of alumni who make a donation,they might be able to implement policies that could lead to increased revenues. Research shows that students who are more satisfi

Measures of central tendency for Walmart: How help with inventory?

Please see attachment for Wal-Mart's data. 1.) Calculate Mean Median and Mode. 2.) Generate a frequency distribution of the data using Microsoft Excel. 3.) Compare the mode median and mean of the data. 4.) Compare the range with the standard deviation of the data. Once these first 4 items are complete, we can start

Revenue and Cost Reimbursement

Prices are most directly related to costs in industries where revenue is based on cost reimbursement. True or False? Why?

Unit Manufacturing Costs: Absorption and Contribution Approaches

Coca Cola Company gathered the following information regarding its only product: Direct materials used $9,000 Direct labor 17,000 Variable factory overhead 13,000 Fixed factory overhead 8,000 Variable selling and administrative expenses 22,000 Fixed selling and administrative expenses 11,000 Units produced and sold 10,0

descriptive and inferential statistics

Hi, Xenia, I need a guide to help to understand 400 words please. What are the similarities between descriptive and inferential statistics? What are the differences? When should you use descriptive and inferential statistics? Give two specific examples of descriptive statistics and two specific examples of inferential statis