Central tendency typically aims to locate the average value in a set of data and can be measured by calculating the mean, median and/or mode.
Measures of dispersion and spread in statistics are used to define the deviation or scatter of data from the central value in a data set.
The distribution of data refers to characteristics used in statistics, such as kurtosis and skewness, which detail the shape of a probability distribution.
In the study of statistics, the normal distribution is one of the most fundamental concepts and is represented by a graph which is characteristic of a symmetric, bell shaped curve.
Consider the application of transportation and assignment models in real life and discuss: • Any two similarities and differences between both the models • Any two events where each of the two models can be used
This week, you have explored how to use factorial ANOVA in research design. You will practice using factorial ANOVA in this Application. To prepare for this Application: Review Chapter 13 of the Field text for a description of the factorial analysis of variance and an example of conducting a factorial ANOVA using PASW.
Aggregate price indexes #4 R & B beverages, Inc., provides a complete line of beer, wine, and soft drink products for distribution through retail outlets in central Iowa. Unit price data for 2003 and 2006 and quantities sold in cases for 2003 follow. Item 2003 quantity cases Unit prices 2003 2006 Beer 35,000 16.25 17.50
1. The weight of a one cubic yard bag of landscape mulch is normally distributed with a mean of 40 pounds and a standard deviation of 2 pounds. a. What is the probability that a bag will weigh less than 40 pounds? b. What is the probability that a bag will weigh between 38 and 40 pounds? 2. Accord
Examples Example 1: Safety experts are trying to determine how long it takes a specific brand of car to come to a complete stop. They have determined that the speed of the car has a large impact on how long it takes to come to a complete stop. They decide to gather data by having the car go 10, 30, 50, 70 and 90 miles per hour
1. Explain the difference between quantitative and qualitative analysis from the manager's point of view. 2. Explain the difference between mutually exclusive and independent events. Can a pair of events be both mutually exclusive and independent? 3. Explain the transformation from any normal distribution to the standard no
1. Dumping, while illegal, would offer products to consumers at very low prices. As a consumer, what is your opinion of this? Explain your reasoning. 2. Tariffs effectively raise the price of goods imported from different countries. How do you feel about this? 3. In your opinion, have U.S. companies effectively lobbied for
Your final project entails systematic extraction of decision-aiding insights out of a dataset (SampleDataSet.xlsx) provided to you in the Doc Sharing area. In this section, you will carry out the following basic estimation and tests of differences using the provided SampleDataSet.xlsx: Identify three continuous and three d
PART I: Primary Task Response: Within the Discussion Board area, write 400-600 words that respond to the following questions with your thoughts, ideas, and comments. This will be the foundation for future discussions by your classmates. Be substantive and clear, and use examples to reinforce your ideas. You are going to loo
12 Multiple Choice Word Problems involving the Binomial, Normal, Poisson and Exponential Probability Distributions
Need some assistance with the following questions. Please provide your answers and supporting documentation in excel format for the following questions.The answers in excel should match the options provided. A student has an important exam coming up and is contemplating not studying for the exam in order to attend a part
Hi, I am having trouble with the attached problem. Any help would be appreciated.
Professor Smith teaches two sections of business statistics, which combined will result in 120 final exams to be graded. Professor Smith has two graduate assistants. Brad and Sarah, who will grade the final exams. There is a 3-day period between the time the exam is administered and when final grades must be posted. During this
Craft a one page brief of the statistical results (include any additional pages needed for any APA tables or graphs and the SPSS syntax and output) in which you do the following: State the statistical assumptions for this test. Using the data set you have selected, choose independent and dependent variables. Develop the nul
Please help with the given statistics assignment: ** Please see the attached file for the complete problem descriptions **
You are part of a school and have to report the results of standardized test scores. Which measure of central tendency would you use? Assume that you don't know how your students will perform; so consider the general effects of outliers on the three measures of central tendency. Research and summarize the general effects that ou
A professor wants to conduct a study to know whether the grades she gives to her students affect their evaluations of her. She teaches four classes of ten students each. She has a theory that the grades and her evaluations are affected by the following characteristics of students: A student's gender A student's age The ho
We will be constructing confidence intervals for the proportion of each color as well as the mean number of candies per bag. Construct a 95% Confidence Interval for the proportion of blue M&Ms® candies. Construct a 95% Confidence Interval for the proportion of orange M&Ms® candies. Construct a 95% Confidence Interva
THE FOLLOWING DATA CONCERNS FUEL SALES BY A DISTRIBUTOR AND IS GIVEN IN THOUSANDS OF GALLONS. Case 1 Case 2 Case 3 JAN 15 12 12 FEB 17.5 15.5 15.5 MAR 20 19 19 APR 22.5 23.5 23.5 MAY 25 27 27 JUN 27.5 30.5 30.5 JUL 30 33 33 AUG 32.5 3
(3) Construct a run chart for the 130 values. Does there appear to be a pattern suggesting that the process is not within statistical control? What are the practical implications of the run chart? Use the data in the following table, which lists carbon dioxide concentrations (in parts per million) for each year from 1880 to
1. What is the difference between the "skewedness" of the distribution of a dataset and its "kurtosis"? 2. What is the expected value (EV) of an investment if there is a 20% chance of realizing a return of $20,000 or a 55% chance of realizing a return of $25,000, or there could be a loss of $15,000? 3. Which is the better
The solution gives detailed steps on performing the hypothesis tesing assuming the data is normally distribution. Both population mean and standard deviation are given in the question.
To decrease the amount of time it takes to deliver packages, a delivery company purchased computer software that finds the optimal route for making deliveries based upon the input of the package destinations. In the past the average amount of time it took to complete deliveries was 9.4 hours with a standard deviation of 0.8 hour
The file DarkChocolate contains the cost per ounce ($) for a sample of 14 dark chocolate bars. (See attached file for data) a.) Compute the mean, median, and mode. b.) Compute the variance, standard deviation, range, coefficient of variation, and Z score. Are the any outliers? Explain. c.) Are the data skewed? If so, how?
Find the mean for each data set. Round to the nearest tenth. 1. Starting teaching salaries (US Dollars): $38,400, $39,720, $28, 458, $29,679, $33, 679 2. Find the mean of each distribution. Round to the nearest tenth. Scores on a quiz, on a scale from 0 to 10: Value Frequency 7 4 8 6 9 7 10 11
American Intellectual Union (AIU) has assembled a team of researchers in the United States and around the world to study job satisfaction. Congratulations, you have been selected to participate in this massive global undertaking. You will need to examine two of the nine sections of data: one section of qualitativ
For the functions in questions 1 and 2 find: f (6) f (-2) f (p) f (r + 1) 1. f (x) = 3-4x 2. f (x) = 8 - x - x^2 3. Graph the following functions: f (x) = 2|x-3| - 4 4. A tree removal service assesses a $400.00 fee and then charges $80.00 per hour for the time on an owner's property a. Is $750.00 enou
Simply reporting measures of central tendency or measures of variability will not tell the whole story. Using the following information, what else does a psychologist need to know or think about when interpreting this information? A school psychologist decided to separate some classes by gender to see if learning improved. Sh
1. The following table gives the Value (in millions of dollars) of the 10 most Valued baseball teams as estimated by Forbes in 2007 (see attached file for table). A) Find the Mean, B) Find the Median, C) What might account for the difference between these Values? 2. The Quaker company conducted a survey to determine w
1. A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 90% confident that her estimate is correct. If the standard deviation is 4.13, how large a sample is needed to get the desired information to be accurate within 0.68 decibels? 2. Assume that the population of heig
The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a period of 200 minutes, with the following results: Arrivals..............Frequencies.........Probability 0.............................14.......................0.07 1.............................31.
Scenario: A print production team is charged with improving the quality of the Herald. The team has chosen the blackness of the print of the newspaper as its first project. Blackness is measured on a device that records the results on a standard scale, where the blacker the spot, the higher the blackness measure. The blackness