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    Quantative Analysis of Data

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    Statistics: Find Mean and Standard Deviation of Sample Data

    For the data in the following sample: 8, 1, 5, 1, 5 A. Find the mean and the standard deviation B. Now change the score of x = 8 to X = 18, and find the new mean and standard deviation. C. Describe how one extreme score influences the mean and standard deviation.

    Leadership Styles: Mean, Standard deviation, variance, mode

    See attached file. The CEO of your company has asked you, the human resource manager, to conduct a study to determine whether or not male managers and female managers perceive leadership styles differently and, if differences are found, to develop a training program that will benefit gender differences in leadership. To this

    Survey of Frequency in Eating at a Fast Food Restaurant

    One question on a student survey asks: In a typical week, how many times do you eat at a fast food restaurant? The following frequency distribution table summarizes the results for a sample n = 20 students. Number of times per week f __________________________________ 5 or more

    Two-Part Statistics Questions

    1.A random sample of 35 days taken at a large hospital shows that an average of 44 patients was treated in the emergency room per day. The standard deviation of the population is 6. Find the 99% confidence interval of the mean number of ER patients treated each day at the hospital. What is the interval lower limit? What is t

    Descriptive Statistics: Calculations and Analysis

    A psychologist interested in political behavior measured the square footage of the desks in the official office of four U.S. governors and of four chief executive officers (CEOs) of major U.S. corporations. The figures for the governors were 44, 36, 52, and 40 square feet. The figures for the CEOs were 32, 60, 48, and 36 square

    Histogram, Pie chart & Descriptive statistics

    Section 2.1: Frequency Distributions and their Graphs (Note: Scatter plots will be revisited on Unit 8.) 1.The Young Republicans Club asked its members how many hours they had worked during the previous week in part-time jobs. The following data lists the number of hours spent working during the previous week. 6 6 6 4 6 6

    If the process variablity steadily increases

    If the process variablity steadily increases, we would observe: An alternation pattern of high value followed by a low value on the R-chart, An upward trend on the R-chart, A downward trend on the R-Chart or A increasing gradual funnel pattern on the R-Chart

    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.