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    Descriptive Statistics

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    I'm stuck on this problem.

    Suppose you are an appraiser for homes in a metropolitan area. Discuss two quantitative variables and two qualitative variables that would apply.

    Problem 67

    67. The following data show that trailing 52 week primary share earnings and books values as reported by 10 companies(the wall Street Journal, March 13/2000). Company -Earnings-Book Value Am Elec -25.21 -2.69 Columbia En -23.20 -3.01 Con Ed -25.19 -3.13 Duk

    I am stuck on this problem

    A seven year old study reported that women whose mothers used the drug DES during pregnancy were twice as likely to develop tissue abnormalities that might lead to cancer as women whose mothers did not take the the drug. a. This study involved the comparison of two populations. What were the populations? b. Do you suppose

    Histograms and Measures of Central Tendency

    Please see the attached file for the fully formatted problems. A. 100 lengths of steel bar were measured and their lengths In centimetres (cm) are given in the table labelled Item 36 on your worksheet. i) Plot a histogram of the data provided. ii) Calculate forthe data: a) The arithmetic mean length. (Show all working). b

    Distance and Time the Ball Travelled

    A ball bounces 1/2 its height each bounce. It is dropped from a height of one foot. a) How many times does it bounce? b) How far does it bounce? c)How long does it bounce? Does it ever come to rest? (Please show work).

    Large Mass Ratios

    How high will the fourth ball bounce if a stack of 4 balls is dropped from a height of 5 feet? Assume the usual perfectly resilient balls and large mass ratios.

    Statistics: Index Numbers

    Use the period 1990-1992 as the base period and compute a SIMPLE index of domestic sales for each year from 1996-1999, and do the same for the number of employees for this same period. Year Domestic International Employees 1990 5427 5805 82.2 1991 6248 6199 82.7 1992 6903 6850 84.9 1993

    Statistical Quality Control Calculations

    The number of "near misses" recorded for the last 20 months at the Lima Intl Airport is 3,2,3,2,2,3,5,1,2,2,4,4,2,6,3,5,2,5,1, 3. Develop an appropriate control chart . Determine the mean number of misses per month and the limits on the number of misses per month. Show all your work/calculations . Are their any months where

    Mean of Women's Heights

    Only for above listed OTA. Suppose women's heights have a mean of 63.6 inches and a stan. dev. of 2.5 inches. Women basketball players must be in top 60% of heights to be eligible for WNBA. Find the height that separates the top 60% from the bottom 40%.

    Only OTA 103997 or 103642 only

    Only for above listed OTAs Pregnancies: normally 268 days is the mean and a stan.dev. of 15 days. If we say a baby is premature if born at least 3 weeks early, what % are born prematurely?????

    Validity for the test: What is the maximum validity for the test

    The reliability coefficient for a test is determined to be 0.84. The standard deviation is 11. The mean for the test is 54. What is the maximum validity for the test? What is the standard error of measurement for the test? What range of scores would you expect an individual who made 54 on the test to make on another tes

    GM engineers want to estimate mean driver response time

    GM engineers want to estimate mean driver response time to a new break light standard Deviation with the symbol Q upsidedown is known to be .15. fifty drivers have a mean response time of .72. find a 90% confidence interval.

    3755- data presentation

    Subject: How do I present an explaination of this data Details: I am suppose to present a half page Explaination of the data collected, by using statistical expressions. Survey for Statistics: 1. Age ____________ 2. Height ____________ 3. Weight ____________ 4. Favorite Activity ____________ 5.

    Creating histograms and calculating means and variances.

    Rent Resident: Amount of monthly profit from residential rent homes There is a data file attached. Rent Commercial: Amount of monthly profit from rent paid on commercial buildings. A realtor owns numerous residential and commercial buildings and collects rent on these properties. The realtor selects 100 months over t

    A Scientist Studying Babies Born Prematurely

    Please see the attached file for full problem description. A scientist studying babies born prematurely would like to obtain an estimate for the mean birth weight, , of babies born during the week of the gestation period. She plans to select a random sample of birth weights of such babies and use the mean of the sample to es

    Standard Deviations of the Symmetrical Distributions Ordered

    Four symmetrical distributions, labeled (a), (b), (c), and (d), are represented below by their histograms. Without performing any calculations, order the respective standards deviations σ_a, σ_b ,σ_c , and σ_d of the distributions. A X X X X X X X X

    Value

    Please see the attached file for full problem description.

    Distributions for Respective Means

    Four distributions, labeled (a), (b), (c), and (d), are represented below by their histograms. Without performing any calculations, order the respective means , , , and of the distributions. A X X X X X X X X X 1 2

    Integer Problem

    I need to verify my work and need help with work on Exercises 4, 5, 6, 7 from attached PDF file and Excel file. Please help soon. Please find the attached zip file for all the related files. 4. The Big Bang Novelty Company makes three basic types of noise-makers: Toot, Wheet, and Honk. A Toot can be made in 30 minutes and has

    Integer Problem

    I need to verify my work and need help with work on Exercises 1, 2, 3 from attached PDF file and Excel file. Please help soon. Please find the attached zip file for all the related files. 1. A manager of a firm's research and development is currently reviewing a set of proposals prepared by her staff. She must soon decide w

    Mean

    Calculate the mean for the given set of numbers: 10, 7, 8, 12, 14, 19, 6, 4

    Word Problem

    At the time Beth was hired as a server at a Restaurant, she was told she could average $20 a day in tips. Over the first 35 days she was employed at the restaurant, the mean daily amount of her tips was $24.85 with a standard deviation of $3.24. At the .01 significance level, can Beth conclude that she is earning an average of

    A. Determine the control limits for the mean and the range. b. Plot the control limits for the mean outside diameter and the range. c. Are there any points on the mean or the range chart that are out of control? Comment on the chart.

    A new machine has just been installed to cut & rough-shape large slugs. The slugs are then transferred to a precision grinder. One of the critical measurements is the outside diameter. The quality control inspector randomly selected five slugs each hour, measured the outside diameter, and recorded the results. The measurements (

    Inference for distributions

    A). Find the mean IQ scores for girls and for boys. It is common for boys to have somewhat higher scores on standardized tests. It that true? b). Compute 95% T intervals of the Girls' IQ's and the Boys' IQ's and explain what these intervals mean. c). Make a histogram for each set of data to determine whether each distribu

    Measurement and measurement scales

    The amount of motivation of an individual was measured by a self report scale that has 32 items each scaled as shown below: 0........1........2........3.......4..........5.........6...........7 never hardly ever sometimes very often The following scores were obtained: Mishelle 192, Justin 128, Matthe