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Descriptive Statistics

Statistic 1. For each case below, choose the most appropriate statistical procedure... 2. Identify the scale of measurement in each of the following ... 3. For the following set of scores, prepare a frequency distribution, a histogram, and a stem-and-leaf display ... (File attached)

1. For each case below, choose the most appropriate statistical procedure: a. A teacher of a low-level reading group is interested in what the average score is for the group of 25 students. b. An administrator wants to find out if there is a relationship between teacher absences and student achievement. c. A math teacher want

Qualitative/Quantitative Data

Details: 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) Po

Number of Units Required

Fixed costs per day are \$20, the variable costs \$0.16. Selling price \$1.50. Generate a net income of \$100 or greater? Using the formula where NI = net income, U = units sold, P = price per unit, VCu = variable costs per unit, and FC = fixed costs.

Literature Review and Plagiarism

What are common practices in writing literature reviews to avoid because they are forms of plagiarism? What should be done instead? How would you organize your literature before writing a lit review?

Mean - Deviation

3-21 The following is a set of data for a population with N=10; 7 5 11 8 3 6 2 1 9 8 a. compute the population mean b. compute the population standard deviation 3-37 The following is a set of data from a sample of n=11 items X 7 5 8 3 6 10 12 4 9 15 18 Y 21 15 24 9 18 30 36 12 27 45 54 a. Compute t

Samples and survey responses

Using AIU's large database of survey responses from the AIU data set, complete the following: Perform hypothesis testing on one variable's data. (Choose either the intrinsic or extrinsic column.) Perform a t-test by formulating a null and an alternative statement, choosing an acceptable significance value, determining the app

What are statistics?

Please see the attached document to answer questions I am having a hard time understanding. From attachment: 1. What are major quantitative design types? Name at least three types and provide a published example of a study for each type. 2. What different types of variables are used in quantitative studies? Describe ea

Response types to classify findings

O Collect your data. o Present your data in one of the four appropriate general response types (rating, ranking, categorization, or sorting). o Classify your findings in order of power (nominal, ordinal, interval, and ratio). Do not discuss your analysis at this time. ? Include an Excel® workbook containing your data.

Stats

A list of 52 employees is below. 1) please compute the mean, median, and standard deviation of the list of the 52 employees. 2) Use excel to choose a simple random sample of size 15 from this frame. 3) please compute the mean, medium, and standard deviation of the annual salaris for the 15 employees included in the si

Quantitative Reasoning for Population Declines

A small town is in a population decline. The town manager has discovered that the town's population is decreasing exponentially at 6% annually. Based on this trend, the town population has decided that if the population falls to 1,000 or less, they cannot pay the town manager's salary. A) If the 2003 population is 12,345 peo

Confidence Intervals for the Mean

Confidence Intervals for the Mean (Large Samples) Find the critical value zc necessary to form a confidence interval at the given level of confidence. (References: definition for level of confidence a. 95%= b. 75%=

Annual Cost of Busing Students to School

The Springdale School board has made the decision to close one its junior high schools (seventh and eight grades) at the end of the school year and reassign all of next year's students to one of the three remaining junior high schools. The school district for the closed school has been divided into five areas as shown in the ta

Transportation and Model Formulation

5. In the transportation problem on the next page, products are produced at plants in Locations A and B and shipped to warehouses in locations X, Y and Z. 5a. According to the model formulation, what is the capacity of Plant B? _________ 5b. According to the model formulation, what is the demand at warehouse Z? ________

PERT network, earliest and latest start time

1. Draw the PERT network, identify the earliest and latest start time for each activity and the amount of slack for non-critical activities Completion Immediate Earliest Latest Amount Activity Time Predecessor Start Start

Population growth model for Austin, TX

In 1990, the population of Austin, Texas, was 494,290. During the next 10 years, the population increased by about 3% each year. A. Write a model (equation) showing the population, P, in thousands of Austin t years after 1990. B. What was the population in 2000? Show your work. C. Estimate the year when the population

Statistics Charts

As the production manager for an electronic circuit company you have encountered the following situation. Part 1 A process for producing electronic circuits has achieved very high yield levels. An average of only 10 defective parts per million is currently produced. What are the upper and lower control limits for a samp

Descriptive Statistics and regression analysis project

PLEASE SUGGEST A PRICE. i need that all instructions be followed. i need back within 24 hrs.

Descriptive statistics and probability problems

Hello. I need help towards this one problem only. It tends to be confusing to me. Please can anybody help me? Determine whether a probability distribution is given. In those cases where a probability distribution is not described, identify the requirements that are not satisfied. In those cases where a probability distributio

Descriptive statistics

The monthly average low temperatures* during different months of year at Denver, CO are given below: January February March April May June 5 8 18 29 40 50 July August September October November December 55 53 44 32 24 12 Source: www.weather.com Word-process your solution and answers below. a) Find the mean year

Descriptive statistics

Below is some data from 2005 for on-the-job deaths in some dangerous jobs. Which job seems the most dangerous? Which seems the least dangerous? Explain. total deaths total employed Driver 993 3,412,370 Farmers 341

% of batteries that has life span that is more than 2065 hours

The life span of a battery is normally distributed, with a mean of 2000 hours and a standard deviation of 30 hours. What percent of batteries have a life span that is more than 2065 hours? 1. 3% 2. 2.6% 3. 1% 4. 1.5%

Statistics: Catagorical and Numerical Variables

1.22 The U.S. Census Bureau site, www.census.gov,contains survey information on people, business, geography, and other topics. Go to the site and click on Housing in the "People and Households" sections. Then click on American Housing Survey. a. Briefly describe the American Housing Survey. b. Give an example of a categor

Descriptive Statistics and Inferential Statistics

In your own words explain the difference between "descriptive statistics" and "inferential statistics." Explain with example situations.

Removing Outliers from Data

While exploring data that was collected for an investigation of resources needed for software testing and improvement, you have found an outlier. The study is focused on two variables: the number of bugs found in the code and the time (in person-hours) required to fix them. The outlier corresponds to a very large project with

Article Summary: Consumers and Their Memory of Smell

Consumers didn't need to be told that Jazz Diet Pepsi was about to hit store shelves; they could smell it. The soft-drink company had placed an ad laced with scents of black cherry and French vanilla in the October 2006 edition of People magazine. Four months later, British travel agency Thomson Holidays sprayed its store win

Complete the table above using Excel functions. You may also use pivot tables if you know how to (see pgs 77-80) (Those of you familiar with SPSS or Minitabs may use those programs instead) (20 pts) Answer the following using the same programs: 1) Which customer type (promotional or regular) spent the most money on average? EXPLAIN (2 pts) 2) What was the standard deviation for promotional and for regular customers? Which group had less variability in their purchases? EXPLAIN (3 pts) 3) Create a bar chart (see pgs 73-75 for histograms) for net sales for all customers. Are net sales positively or negatively skewed--EXPLAIN. Keep bar chart as part of your answer (5 pts)

PELICAN STORES Pelican Stores, a division of National Clothing, is a chain of women's apparel stores operating throughout the country. The chain recently ran a promotion in which discount coupons were sent to customers of other National Clothing stores. Data collected for a sample of 100 in-store credit card transactions at Pe

Tournament Rounds- Decay Rate

2. Each year the local country club sponsors a tennis tournament. Play starts with 128 participants. During each round, half of the players are eliminated. How many players remain after 5 rounds? At what round does the tournament can't be played anymore? Chart the decay rate.

Brownian Motion: Martingale Processes

Let W(t) be a Brownian motion. For each of the following processes, verify whether it is a martingale process: (1) X(t)=W^2(t)−t (2) X(t)=W^3(t)−3tW(t) (3) X(t)=t^2W(t)−2∫uW(u)du (The limit on the integral is 0 to t) (4) X(t)=W^2(t)

How many ads of each type should the candidate for mayor use

A candidate for mayor in a small town has allocated \$40,000 for last minute advertising. He will be using two types of ads radio ads which cost \$200 per ad and reach 3,000 people and television ads which cost \$500 per ad and reach 7,000 people. In planning the campaign the manager would like to reach as many people as possible b