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Quantative Analysis of Data

American Intellectual Union: Job Satisfaction

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

Functions using a graphing calculator

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

Reporting Measures of Central Tendency or Variability

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

Basic Statistics Problems and Solutions

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

statistical analysis: standard deviation

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

Computing the Expected Number of Arrivals per Minute

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.

Phase 3 - Managing the Springville Herald

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

Analytic Hierarchy Process (AHP)

I started working on this problem using Excel , but I am not sure if i am am approaching this correctly. the problem statement is in a word document AHP some explanation would be helpful. The MIS Department is developing a computer lab to support advanced applications. The planning committee has focused on three main criteria

Four Questions: Savings Rate, Tax, Wonderlic and Compensation

Am working on practice problems for Management Stats class. Having problems with 4 of the questions. Please Help! Please see attachments for correct formats and Excel charts. --------------------- (3.31, 3.39, 3.49, 3.73) The file SavingRate contains the yields for a money market account, a one-year certificate of depo

Standard Deviation and Area under a Standard Normal Curve

A random variable X is normally distributed with µ = 60. Convert the value of X to a Z score, if the standard deviation is as given. X = 68 sd = 8 and if the standard deviation is as follows: X = 72 sd = 3 and if the standard deviation is as follows: X = 66 sd = 4 Question #2 (three part question) a)Find the area u

Use of Central Tendency

Suppose you were in charge of advertising for an automotive dealership when the gas prices increased to $6 per gallon. Most of your cars are fuel-efficient, but you have two models that have extremely poor fuel economy, that is, a low number of miles per gallon. How would you use a measure of central tendency in your adverti

Proportion and Quartiles

Please see the attached file for the questions. 1. A set of data whose histogram is bell shaped yields a sample mean and standard deviation of 50 and 4, respectively. Approximately what proportion of observations are: a) Between 46 and 54? b) Between 42 and 58? c) Between 38 and 62? 2. Calculate the first, second, a

Integer Programming: Brenda Last's Course Schedule

Brenda Last, an undergraduate business major at State University is attempting to determine her course schedule for the fall semester. She is considering seven 3-credit-hour courses, which are shown in the following table. Also included are the average number of hours she expects to have to devote to each course each week (based

Standard Deviation and Normal Distributions

Could you prepare a frequency distribution from the data I'm providing below then calculate the Standard Deviation? Is this a normal distribution? What are the implications? Data to calculate: Day 1: 8, 16, 8, 16, 16 Day 2: 16, 16, 8, 5 Day 3: 8, 8, 8, 16, 8, 16 Day 4: 16, 16, 16, 16 Day 5: 16, 8, 4.

Descriptive Statistics: Student Test Scores

Six students in Mrs. Garcia's Spanish class received the following scores on a test: 10 12 5 2 5 8 Compute the following: (a) The mean testing score (b) The median testing score (c) The modal testing score (d) The range of the testing scores (f) The standard deviation of the testing scores (g)

Statistics: Analyzing Statistics

Consider the file "advertising.xls" (attached) showing data for magazine titles, the cost of a full-color page advertisement (page), audience (subscribers), male percentage of subscribers, and household income. The objective of this project is to find out if there is any relationship among variables using regression analysis tec

Understanding Mean, Median, Mode and Range

1. Peter, a sixth-grade mathematics teacher, recently administered an exam. He wants to report a measure of central tendency but he doesn't know what to do with the fact that two students have much lower scores than anyone else. What is the best measure of central tendency for Peter to report? a. Range b. Standard deviation

Where would you use mean, median, mode and why?

Average (mean) is the most widely used measure of central tendency, but is not always the most appropriate. a. Please provide unique examples of where one would use median, mode, mean, and why. b. Please provide an unique example of where mean, median, and mode are appropriate measures in one's professional life.

Statistics: Active Military Personnel by State

See the attached file. The number of active military personnel per state is outlined in the attached document. A. Calculate the mean and standard deviation for the population. B. Take 10 samples of size 5 from the population. Use either simple random sampling or systematic sampling with the help of the table of random nu

Measures of Central Tendency and Dispersion with SPSS

I am using the IBM SPSS statistics 2.0. I have gone through the software several times. I need help with this assignment as I am struggling with the basics of this software. Apart from responding to this assignment I will appreciate step by step guide on how to generate syntax and output files in SPSS I was asked to select

Calculating the Mean Difference

Please show me how you would approach calculating the following, I don't understand what MD is. Calculate the difference in scores and find the MD for the following data from a repeated-measures study. Subject Treatment 1 Treatment 2 A 34 44 B 41 39 C

Properties of Data Distributions

Consider the many possible distributions of grades on a quiz in a statistics class; imagine that the grades could range from 0 to 100. For each of the following situations, give a hypothetical mean and median (that is, make up a mean and a median that could occur with the following scenarios). a. Normal distribution b. P

Inventory Management Decision Model

Inventories represent a considerable investment for every organization; thus, it is important that they be managed well. Excess inventories can indicate poor financial and operational management. On the other hand, not having inventory when it is needed can also result in business failure. The two basic inventory decisions th

Elementary Statistics: Mean, Median and Mode

Q8: An insurance company crashed four cars of the same model at 5 miles per hour. The costs of the repairs for each of the four crashes were $411, $436, $482 and $238. Compute the mean, median and mode cost of repair. Q10: The scores and their percent of the final grade for a statistics student are given. What is the student

Statistics: Standard Deviation, Random Chance and Unusual Results

[2] Neuroblastoma, a rare form of malignant tumor, occurs in 11 children in a million, so its probability is 0.000011. Four cases of neuroblastoma occurred in Oak Park, Illinois, which had 12,429 children. a. Assuming that neuroblastoma occurs as usual, find the mean and standard deviation of cases in groups of 12,429 children

Discrete or Continuous Random Variables

Classify the following as discrete or continuous random variables. (A) The number of people in India (B) The time it takes to overhaul an engine (C) The blood pressures of patients admitted to a hospital in one day (D) The length of a centipede

Frequency table, range, etc.

A university's associate directors for whom a statistician was consulting were interested in alumni donations, as are many schools, not only because they want the money but also because it is one of the criteria by which U.S. News & World Report ranks U.S. institutions of higher learning. U.S. News includes this criterion becaus

Using Descriptive Statistics to Understand Sample Data

Task: You run a small Internet business and are concerned about customer support service levels on the Help Desk. You want to know how many calls per day are handled by your help desk staff. You collect the data at left over a 90-day period. Use appropriate descriptive statistics to make sense of this data. Use an appropriate g