Share
Explore BrainMass

Quantative Analysis of Data

X chart and the R chart

= - (Show all work) if X = 2.0144, R = 0.0972, and 25 subgroups of size 5 - a. Find the UCL and the LCL for the X chart. b. Find the UCL and the LCL for the R - chart.

Statistics Levels of Measurement: Scaling

Levels of Measurement/Scaling Identify which level of scaling is present in the examples below N = Nominal, O = Ordinal, I = Interval, R = Ratio _____ A high temperature of 83 degrees Fahrenheit _____ A survey result that 24 students work full time, 36, part time. _____ Bill is consistently rated most effective commun

John and Sons: Memo about thickness of paper in machines; confidence limits

You are a quality analyst with John and Sons Company. Your company manufactures fax machines, copiers, and printers that use plain paper. The CEO of the company wants the machines to handle 99.5 percent of all the paper that is used in them without the paper getting jammed. The CEO asks you to determine the thickness of pape

Mean, mode, range, median for widgets produced

The number of widgets produced by 9 employees in an eight hour shift is recorded below. Find the mean number of widgets produced. 135, 120, 116, 119, 121, 125, 135, 131, 123 What is the range of widgets produced given in problem presented above? What is the mode of the number of widgets produced presented abo

Statistics : Multiple choice questions

1. A large mass of data can best be summarized pictorially by means of: a. the range b. a histogram c. the frequency table d. mean and standard deviation 2. For a symmetric distribution, the mean and median are a. the same b. always different c. possi

Basic statistical problems

1. The mean price of 5 items is $7.00. The prices of the first four items are $6.50, $8.00, $5.50 and $6.00. How much does the fifth item cost? 2. The range of a set of numbers is 1,362. The greatest number is 2,172. What is the least number? 3. The mean of a set of 7 numbers is 13. What is the sum of the numbers? 4.

Standard Error and the Mean of life insurance per household in the US

Each response must include your calculations. Information from the American Institute of Insurance indicates the mean amount of life insurance per household in the United States is $110,000. This distribution is positively skewed. The standard deviation of the population is not known. PLEAS

Mean, median, and mode computations for 8 mutual funds

Mean, median, and mode: Computations The following list contains the average annual total returns (in percentage points) for 8 mutual funds. The mutual funds appear in an online brokerage firm's "all-star" list. 23, 16, 9, -5, 40, 36, 16, 21 A - What is the mean of this data set? If the answer is not an integer, roun

Weighted mean profit per delivery for a bottling company

What is the weighted mean profit per delivery - a bottling company offers three kinds of delivery service - instant, same day and within 5 days. The profit per delivery varies according to the kind of delivery. The profit for an instant delivery is less than the other kinds because the driver has to go out directly to a grocery

Data Set Exercise

Refer to the Real Estate data, which reports information on homes sold in the Denver, Colorado, area last year. a. Select the variable selling price. 1. Find the mean, median, and the standard deviation. 2. Write a brief summary of the di

Vail Resorts Average employee hourly pay rate

Vail Resorts pays part-time seasonal employees at ski resorts on an hourly basis. At a certain mountain, the hourly rates have a normal distribution with standard deviation of $3.00. If 20% of all part-time seaonal employees make more than $13.16 an hour, what is the average hourly pay rate at this mountain? A) $16.16 B) $

Statistics: 23 problem exam

1. Distinguish between descriptive statistics and inferential statistics. 2. Distinguish between and independent and a dependent variable - give example. 3. The annual incomes of the five vice presidents of Erlen industries are 75000 78000 72000 83000 90000 a. What is the range? b. What is the arithmetic mea

Mean difference for effect of treatment by gender

For the data in the following matrix: No treatment Treatment Male M=5 M=3 Overall M=4 Female M=9 M=13 Overall M=11 Overall M=7 Overall M=8 A: Describe the mean difference that is the main effect for the treatme

Weighted Mean of tabular data for number of children

Weighted mean: Tabular data The table below summarizes the number of children per household for a sample of 41 middle-income families. Number of households Number of children 3 4 16 2 12 3 10 6 What is the mean number of children per household for these fam

Weighted Mean of Fiction Books Read Last Summer

Weighted mean: Tabular data The following summarizes the number of fiction books read last summer by a sample of 36 students at a certain college. Number of students Number of books 2 1 11 3 12 4 11 7 What is the mean number of books read? Round your answer

Weighted Mean Tabular Data

Weighted mean: Tabular data The scores on a test for a sample of 40 statistics students are summarized in the following table. Number of students Score 10 90 17 80 13 70 Find the mean score. Round your answer to at least one decimal place.

Trend Equations

The data in DJIA.XLS (CD-> browse->Excel_Data_Files) represent the closing value of the Dow Jones Industrial Average (DJIA) over the 24-year period 1979 through 2002. See Problem 15.17. Using EXCEL or PHStat2, answer the following: 1. Find a linear trend equation to these data. a) Y^ = -934.2717 + 452.5928X b) Y^ = 934.2717

Statistics

Comparing Variations: 1. For the following exercise, complete the following: Find the mean, median, and range for each of the two data sets. Find the standard deviation using the rule of thumb for each of the data sets. Compare the two sets and describe what you discover. The following data sets shows t

Statistical Techniques: Problem 88, 56, 64, 18, 22

Statistical Techniques in Business and Economics Problem 88 (Ch3) Refer to the Baseball 2005 data, which reports information on the 30 major league teams for the 2005 baseball season. Select the variable team salary and find the mean, median, and the standard deviation. Select the variable that refers to the age the stad

Difference in treatment effects

For the data in the following matrix: no treatment treatment overall m=4 male m=5 m=3 female m=9 m=13 overall m=11 -------------------------------------------------------------------- overall m=7 overall m=8 a) describe

Statistical Calculations for Initiation into the Cardinal Club

Nine college juniors are aspiring to become members of the hallowed Cardinal Club at LSU. Successful initiation involves accurately performing a series of rituals involving ordered mental and physical tasks, which include sips of beer at certain points, after initially having consumed six beers. Every time a participant botche

TCO 2: The Heights of 10 Sixth Graders Are Listed in Inches

TCO 2) The heights of 10 sixth graders are listed in inches: {53, 61, 54, 60, 58, 62, 55, 58, 59, 56}. (a) Find the mean, median, mode, sample variance, and range. (b) Do you think that this sample might have come from a normal population? Why or why not?

Statistics: Compare 3 treatments and compute SS

The following data represent the results from an independent-measures study comparing three treatments. a) compare ss for the 3 set treatment means.(use the three means as a set of n=3 score and compare ss) b) using the result from part a compute n(ss means) c) now compute ss between with the computational formula using the

Define the Four Levels of Data

Please help with the following problem involving analysis of data. Provide at least 400 words in this posting. No references are requested. What are the four levels of data? Indicate them along with a definition of each in order from lowest to highest.