Explore BrainMass

Descriptive Statistics

Descriptive Statistic Questions with Explanations

1. True or false: The binomial distribution equations will not give exact probabilities for experiments in which sampling is done without replacement. In those cases, the trials are not truly independent. 2. A pet store stocks Japanese koi fish. The owner of the pet store orders five koi from his supplier. Of the supplier's

A study was conducted comparing female adolescents who suffer from bulimia (an eating disorder) to healthy females with similar body compositions and levels of physical activity. Listed below are measures of daily caloric intake, recorded in kilocalories per kilogram body weight, for samples of adolescents from each group.

A study was conducted comparing female adolescents who suffer from bulimia (an eating disorder) to healthy females with similar body compositions and levels of physical activity. Listed below are measures of daily caloric intake, recorded in kilocalories per kilogram body weight, for samples of adolescents from each group. Da

Central Tendency

1. Compare the mean and median of the HC3 variable and the mean and median of the OUTNI variable. What does the similarity/difference between the mean and median indicate? 2. On average, do people use the nutrition information the same when buying food for home or selecting a menu item? 3. Develop a z-score for the age vari

What will be the next year's EPS? What rate of growth is expected?

Soencer Supplies' stock is currently selling for $60 a share. The firem is expected to earn $5.40 share this year and to pay a year-end dividend of $3.60. (a) If investors require a 9% return, what rate of growth must be expected for Spencer? (b) If Spencer reinvests earnings in projects with average returns equal to the stock

Help with Supplementary Exercises

I need help (step-by-step) with the following example exercises (please see attached). These examples are used to help us prepare for the the types of problems that will be on our final. I am not good in math (especially statistics) and hope that someone can help break these answers down in laymens terms. Thanks, E

Differences in Aggressive Behavior Across Grade Levels

A researcher ws interested in the differences in aggressive behavior across grade levels. They selected two samples to compare: a group of first graders at a public school and a group of 5th graders from a private school. The researcher measured the number of times each child hit another during 30 minute playground interactions.

Label and Identify the Variables and Type Measurements

Label and identify the variables and type measurements in the article below. While 80 percent of Americans believe it is a good time to buy a home, home owners have never been so reluctant to sell, according to a new study that found "home selling sentiment" at a record low. The report by the Mortgage Bankers Association's

Descriptive statistics in SPSS

See attached file. First, using SPSS, you must use the Analyze, Descriptive Statistics, Frequency commands to generate frequency data for all of the categorical variables and the Analyze, Descriptive Statistics, Descriptive commands to generate means and standard deviations for your continuous data. Please see Lesson 21 i

Frequency Distributions and Sampling..

The data below is how many minutes that I have read each day for 15 days. Compare the data from the first 10 days to the last 5 days 20, 10, 17, 20, 60, 0, 30, 0, 0, 0, / 15, 15, 30, 25, 18 Is the larger sample changing anything? Is your mean increasing or decreasing? Do you think the current sample you have i

Data Set and Specific Number of Observations

1.) Suppose you have a data set with 100 observations. All 100 data points have values over 1,000. The mean and the median are the same. Now you change the datapoint with the lowest value from a value of 1,001 to a value of 4. Now you recalculate the mean and median. Compared to the mean, the median will now be: A) cant tell B

Statistical Analysis - Principle of Statistics

Statistics is the art and science of collecting, organizing, analyzing, and interpreting data. Please study any sample dataset from a larger population. You are expected to organize, analyze and interpret the data, and make reasonable inferences and comparisons about the population based on the sample you are studying. Attache

Statistics for Managers

A manufacturing company produces electrical insulators. If the insulator breaks when in use, a shor circuit is likely to occur. To test the strength of the insulators, destructive testing is carried out to determine how much force is required to break the insulators. Force is measured by observing the number of pounds of forc

level of measurement

A media consulting company installs software on the set-top boxes of 100,000 U.S. cable TV customers; every ten seconds, the software records what channel is being viewed. These cable customers have agreed to participate, providing the media company with demographic data, such as age, gender, and income. Each week, the media c

Frequency Distributions and Sampling

Please help solve the following problems related to frequency distributions and sampling . 1. To get the best deal on a CD player, Tom called eight appliance stores and asked the cost of a specific model. The prices he was quoted are listed below: $ 298 $ 125 $ 411 $ 157 $ 231 $ 213 $ 304 $ 272

Mean - Excel problems

3.64. A manufacturing company produces steel housings for electrical equipment. The main component part of the housing is a steel trough that is made of a 14-gauge steel coil. It is produced using a 250-ton progressive punch press with a wipe-down operation and two 90-degree forms placed in the flat steel to make the trough. The

Descriptive Statistics and Business Decisions

If you were given a large data set such as the sales over the last year of our top 1,000 customers What types of business decisions might be affected by these descriptive statistics? Will these sample statistics accurately estimate the purchasing habits of all our customers? Why or why not?

Introduction and Descriptive Statistics

REQUIRED COURSE MATERIALS Grove, S. (2007). Statistics for health care research: a practical workbook. (1st ed.). St. Louis, MO: Elsevier. ISBN-13: 9781416002260 (Includes only Exercises 16, 29, 31, 36, 27 and 40) (Available as eBook in Canyon Connect) Burns, N., & Grove, S. (2011). Understanding nursing research: Buildin

Probability of certain gender, age, height in selected sample data

See attached file for full problems and data. Answer each problem below. Be sure to show all work. Give statistical evidence for your analysis and use statistical vocabulary. Problem 1: What is the probability that a person selected at random from the collected data will be male?

Descriptive Statistics & Charts Data Set

Problem Set 1: Please view the attachment as well. The data set contains the following variables: Sales: Total sales (in $) by each salesperson last year Department: What department (home electronics, computers, etc) the salesperson works in. Year born: The year in which the salesperson was born Training Hours: Number


See attached file. A recent national survey reports that the general population gives the president an average rating of µ = 62 on a scale of 1 to 100. A researcher suspects that college students are likely to be more critical of the president than people in the general population. To test these suspicions, a random sample

Kick-Start Speech Management

The CEO of your company expresses concern to the VP of Marketing that the sample chosen for the survey in which all the transactions were taken during a single shift of one employee is an inadequate basis for making decisions about a marketing plan. The VP of Marketing wants you to discuss your view on it during a monthly mee

Statistics: Measured Lifetimes

1. The following list is of measured lifetimes (in thousands of hours) of a sample of a certain machine component. 5.6 4.1 6.0 5.8 5.2 4.3 6.4 5.5 6.0 5.1 4.9 4.2 4.8 6.8 5.6 5.2 7.3 5.4 4.7 5.9 5.0 6.3 4.4 6.0 (i) Group the data into classes, and draw a frequency distri

Descriptive Statiatics & Z Score

Attached are two files (Excel and Word). Excel comes with 2 questions and, Word comes with 1 question. This week my class covered the average and the standard deviation; the normal approximation for data.

Theory vs Creativity in Design

I have to discuss and recommend approaches to creative tension between existing management philosophies and the ability to create new business models. The following two questions must be addressed: * How do leaders integrate innovative principles while adhering to industry and market mandates? * How may an organizatio

Exploratory Data Analysis for AJ Davis, a department store chain

See attached data file. AJ DAVIS is a department store chain, which has many credit customers and wants to find out more information about these customers. A sample of 50 credit customers is selected with data collected on the following five variables. LOCATION (Rural, Urban, Suburban), INCOME (in $1,000's - be careful

Problems with Descriptive Statistics

City apartment rent ($US) Amsterdam 1,480 Athens 840 Auckland 1,330 Bangkok 550 Barcelona 1,530 Beijing 760 Berlin 920 Bogotá 990 Bratislava 890 Brussels 2,290 Bucharest 930 Budapest 1,190 Buenos Aires 500 Cairo 550 Caracas 2,080 Chicago 2,990 Copenhagen 1,820


Note: If this assignment is in the library I cannot use it because a new set of data is used each session. *******I have no clue how to do this. So PLEASE show me how ! you have been selected to participate in this massive global undertaking for American Intellectual Union The study will require that you examine data,

Scales of measurement: Nominal, ordinary, interval, & ratio

Four scales of measurement were introduced in this chapter: nominal, ordinal, interval, and ratio. a. What additional information is obtained from measurements on an ordinal scale compared to measurements on a nominal scale? b. What additional information is obtained from measurements on an interval scale compared to measure