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Quantative Analysis of Data

Describing/exploring/comparing data

1. A statistics class consists of 24 students, all of whom are unemployed in low paying part time jobs. The class also includes a professor who is paid an enormous salary. Which does a better job of describing the income of a typical person in the class of 25 people (including the professor): the mean or median? 2. A sociol

Lind, Chapter 3 Measures of central tendency and dispersion

60. Owens Orchards sells apples in a large bag by weight. A sample of seven bags contained the following numbers of apples: 23, 19, 26, 17, 21, 24, 22. 1. Compute the mean number and median number of apples in a bag. 2. Verify that S (X - X) = 0. 62. The Citizens Banking Company is studying the number of times the ATM l

Standard deviation of difference

The differences between two sets of dependent data are: -2 , -2 , -16 , -4 , -2. Find SD Round to the nearest tenth (one decimal place). See attached file for full problem description.

Statistics Terms

1) What is the variance-measures how different scores are from each other _ S2= E(X-X)2 ________ N 2) What is the equation for standard deviation-square root of variance (more meaningful because it puts variability measure in the same units as original data) S=(SQUARE ROOT) E(X-X)2

Coefficient of skewness

Listed below are the commissions earned ($000) last year by the sales representatives at the Furniture Patch, Inc. $3.9, $5.7, $7.3, $10.6, $13.0, $13.6, $15.1, $15.8, $17.1, 17.4, 17.6, 22.3, 38.6, 43.2, 87.7 A. Determine the mean, median, and the standard deviation. B. Determine the coefficient of skewness using Pea

Problem set

(See attached file for full problem description) 1. Dave Carter, the loading master for DeMonier International Cargo Company in New Orleans, LA, is responsible for preparing a loading plan for a freighter bound for Ghana. An agricultural commodities dealer wants to charter the freighter and transport the following products a

Problem set and definitions of basic statistical terms.

1. Explain the following concepts: 1. Statistics 2. Parameter 3. Raw data 4. Grouped data 2. Refer to the math scores of the 12 students below: 75 80 68 53 99 58 76 73 85 88 91 79 Find the percentile rank for the score 85. Give a brief int

RunChart Analysis

I was wondering if you can help me with interpreting and analyzing a runchart.. i would need the following information from it: i need to know the actual performance, is there a trend, and whats theaverage performance, how does the average performance compare to the goal or benchamark In the second sheet calculate the data li

5 Probability Problems: Bayesian Probability and Plots

1. The following data are monthly steel production figures, in millions of tons. 7.0, 6.9, 8.2, 7.8, 7.7, 7.3, 6.8, 6.7, 8.2, 8.4, 7.0, 6.7, 7.5, 7.2, 7.9, 7.6, 6.7, 6.6, 6.3, 5.6, 7.8, 5.5, 6.2, 5.8, 5.8, 6.1, 6.0, 7.3, 7.3, 7.5, 7.2, 7.2, 7.4, 7.6 a. Draw a stem-and-leaf display of these data. b. Draw a box plot of thes

Quantitative Analysis of Data Problems

Seven students took a statistics test and a technology test with the following results: Statistics Technology Student Raw Score (X) Standard Score (Z) Raw Score (X) Standard Score (Z) Jennifer 50 +1.50 50 +1.0 Brian 49 +1.00 48 +0.50 Jay 47 0.0 52 +1.50 Ross 48 +0.50 40 -1.50 Marie 44 -1.50 44 -0.50 Charles 45 -1.00 42

Probability Assistance

1. A minor league baseball manager boasted about his players' batting averages. Below is a frequency distribution of those averages. Batting Averages Frequency Cumulative Frequency 270.5 to 279.5 2 2 279.5 to 288.5 3 5 288.5 to 297

Data questions: Calculating mean, median, mode and standard deviation

Question Four. The following values are the number of months that individuals were not serving time during the previous year (out of jail). Note that a value of 0 indicates that a subject was in jail for the entire year. Values for 35 subjects are as follows: 5 10 0 5 11 0 0 12 0 3 7 0 8 12 0 3 12 12 12 0 12 8 9 12 8 10 12 8

Problem on mean, median, mode, variance, quartile, std dev etc

I have do answer the questions below, using different numbers can u answer them with those number so that I can answer mine. Please elaborate on the last set of questions, the begining questions 1-11 I understand, but I still need you to answer. so that can can make sure I'm doing this right Given the following set of data

Mean, Median, Mode, Standard Deviation and Variance

The Data Set and Data Set Key below contains the following eight sections of data that needs to be used: (1) Gender (2) Age (3) Department (4) Position (5) Tenure (6) Overall Job Satisfaction (7) Intrinsic Job Satisfaction - Satisfaction with the actual performance of the job (8) Extrinsic Job Satisfaction- Things external to t

Calculating Negative Predictive Value (Statistics)

Modify Acron's model (Excel filed attached) so that development lasts for an extra year. Specifically, assume that development costs of $7.2 million and $2.1 million are incurred at the beginnings of years 1 and 2, and then the sales in the current model occur one year later, that is from year two until year 21. Again, calculate

Solving Statistic Problems

(See attached file for full problem description with diagrams) 14. The following chart shows the selling price ($000) of houses sold in the Billings, Montana, area. a. How many homes were studied? b. What is the class interval? c. One hundred homes sold for less than what amount? d. About 75 percent of the homes sold fo

Range, Mean Varience and Standard Deviation

Find the range, mean, variance, and standard deviation of the population data set. 19 20 17 20 21 21 19 18 19 19 17 17 16 18 17 17 17 18 18 18 Range: Population Mean= (rounded to the nearest hundreth) Population variance =(round to the nearest hundreth) Population standard deviat

To find mean and standard deviation of distribution

Three tables listed below show "random variables" and their " probabilities. However, only one of these is actually a probability distribution. A) What is it? Table 1 Table 2 Table 3 X P(X) X P(X) X P(X) 5 .3 5 .1

Stem and Leaf Plots: Mean, median, mode

The number of stolen bases by major league baseball player for each season during his career. 6|6 5|4 0 4|9 6 4 3|8 7 5 5 3 0 2|9 4 1| 0|8 7 3 What is the mean of the data? (Round to the nearest hundredth) What is the median of the data? (Round to the nearest tenth) What is the mode? you gave me t

Mean, Medan & Mode from a Stem-and-Leaf Diagram

Number of stolen bases by major league baseball player for each season during his career: 6|6 5|4 0 4|9 6 4 3|8 7 5 5 3 0 2|9 4 1| 0|8 7 3 What is the mean of the data? (Round to the nearest hundredth) What is the median of the data? (Round to the nearest tenth) What is the mode?

Statistics: Calculate the weighted mean for semester grades

Assume a student received the following grades for the semester: History, B; Statistics, A; Spanish, C; and English, C. History and English are 5 credit hour courses, Statistics a 4 credit hour course and Spanish a 3 credit hour course. If 4 grade points are assigned for an A, 3 for a B and 2 for a C, what is the weighted mean f

Statistics

Company Symbol Weight Close $ 3M Co. MMM 10.4312 125.72 Alcoa Inc. AA 1.8262 22.01 Altria Group Inc. MO 2.7298 32.90 American Express Co. AXP 3.0741 37.05 AT&T Corp. T 1.3715 16.53 Boeing Co. BA 2.2925 27.63 Caterpillar Inc. CAT 4.3768 52.75 Citigroup Inc. C 3.2508 39.18 Coca-Cola Co. KO 3.3114 39.91 E.I. DuPont de Nem

Assignment Stumper

I have a problem in my textbook and already know the answers (the answers to every question are listed at the end of the text); however, I can't for the life of me figure out the steps in the process to solve this one. It looks simple enough (it's a simple assignment problem), but I'm stumped. The quantitative methods depar

R-Chart

A metal stamping machine is used to form key blanks that will eventually be machined with different combinations of grooves and teeth to become finished keys for automobile door locks. Every 15 minutes a subgroup of 5 key blanks is taken, and the length of each key is measured. The table attached shows these measurements (in inc

Computers in School: Article

Please provided comments/insights on this article/report: The title: "When Computers Go to School: How Kent School Implemented Information Technology to Enrich Teaching and Learning" by: Phillip D. Devin (http://www.rand.org/publications/TR/TR126/TR126.pdf). If you type the title on the search button it will come up.