Answered: Analyse the process and importance of…

Analyse the process and importance of conforming to standards when booking in, handling and analysing samples, as well as the process of assessing, reporting and discussing the resulting data?

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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This requires manual calculation as well as analyzing data using the statistical package R. The detailed rubric for this may be located in the guide as well as the document. You will be working with the KBP dataset provided in the course space. You will also need to use the document, Questions for KBP Survey. This document has selected questions as they appeared on the questionnaire that was administered to collect the data for this project. 1. Classify the variables by the levels of measurement used. Explain your choice of the levels of measurement. 2. Using R, generate a graph to represent the sample by alcohol usage in the past 4 weeks. What can you say about alcohol usage among this sample of young persons? 3. Using R, calculate the proportion of individuals by relationship status and report in a relative frequency distribution table. Respondents # Age of Respondent Sex of Respondents Relationship Status Age at first Sexual Encounter Practice Religion number of persons use…
Several methods of estimating the number of seeds in soil samples have been developed by ecologists. An article gave the accompanying data on the number of seeds detected by the direct method and by the stratified method for 27 soil specimens. Specimen Direct Stratified 1 21 7 2 34 38 3 0 7 4 60 58 5 20 54 6 61 61 7 40 27 8 7 7 9 14 7 10 94 100 11 1 0 12 67 58 13 78 67 14 21 54 Specimen Direct Stratified 15 34 27 16 0 0 17 38 38 18 18 14 19 94 94 20 1 14 21 40 47 22 21 21 23 0 0 24 7 14 25 14 40 26 18 14 27 40 78 Do the data provide sufficient evidence to conclude that the mean number of seeds detected differs for the two methods? Test the relevant hypotheses using ? = 0.05. (Use ?direct − ?stratified.) Find the test statistic. (Round your answer to two decimal places.) t = Find the df. (Round your answer down to the nearest whole number.) df = Use technology to find the P-value. (Round your answer to four…
Chest Injury Rating Car Driver Passenger Car Driver Passenger 1 42 35 10 36 37 2 42 35 11 36 37 3 34 45 12 43 58 4 34 45 13 40 42 5 45 45 14 43 58 6 40 42 15 37 41 7 42 46 16 37 41 8 43 58 17 44 57 9 45 43 18 42 42 Generate test results (α = .01) using data analysis (EXCEL).
The Wall Street Journal subscriber survey (October 13, 2003) asked 46 questions about subscriber characteristics and interests. State whether each of the following questions provided qualitative, discrete or continuous variable and indicate the measurement scale appropriate for each. •What is your age? •Are you male or female? •When did you first start reading the WSJ? High school, college, early career, midcareer, late career, or retirement? •How long have you been in your present job or position? •What type of vehicle are you considering for your next purchase? response categories include sedan, sports car, SUV, minivan, and so on.
On Data : Fill-in the columns : A. according to source B. according to type C. according to level of measurement type Level of Measurement Variable source 1.name 2.age 3.temperature 4.religion 5.height 6.income 7.civil status 8.weight 9.principal 10.birth order On Methods of data presentation [Performance of students in Aralan Pan] Show graphical presentation of the data in : rating freq 95-100 4. 1.) pie graph 2.)bar graph 91-94 85-90 12 81-84 29 75-80 17 70-74 13 Problem #2
Several methods of estimating the number of seeds in soil samples have been developed by ecologists. An article gave the accompanying data on the number of seeds detected by the direct method and by the stratified method for 27 soil specimens. Specimen Direct Stratified 1 21 6 2 32 38 3 0 6 4 60 58 5 20 52 6 61 61 7 40 26 8 6 6 9 12 6 10 92 100 11 1 0 12 66 58 13 78 66 14 21 52 Specimen Direct Stratified 15 32 26 16 0 0 17 38 38 18 18 12 19 92 92 20 1 12 21 40 46 22 21 21 23 0 0 24 6 12 25 12 40 26 18 12 27 40 78 Do the data provide sufficient evidence to conclude that the mean number of seeds detected differs for the two methods? Test the relevant hypotheses using ? = 0.05. (Use ?direct − ?stratified.) Find the test statistic. (Round your answer to two decimal places.) t = Find the df. (Round your answer down to the nearest whole number.) df = Use technology to find the P-value. (Round your answer to four…
Create an Excel Spreadsheet for a beer rating study Evaluate the impact of caffeine on crankiness Write the APA formatted results for this analysis, including R2 for the results and post hoc analyses if needed Participant ID. Caffeine Level Crankiness Score 1 0 MG 40 2 0 MG 42 3 0 MG 30 1 50 MG 30 2 50 MG. 45 3 50 MG 38 1 100 MG 53 2 100 MG 65 3 100 MG 64
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A New York Times poll asked 1,850 adults in the United States a series of questions to find out their view on the U.S. economy. The 1,850 adults make up: the population the statistical inference the secondary data source the primary data source the sample 2. A sample of workers who completed training were asked to rate the training according to the following classification: outstanding, very good, fair, or poor. The level of measurement used is: nominal ordinal comprehensive interval ratio 3. The following frequency distribution displays the weekly sales of a certain brand of television at an electronics store. Number Sold Frequency 1-5 3 6-10 7 11-15 14 16-20 22 21-25 4 What is the width of each class in this distribution? 1 2 5 10 25
IBL Company manager asked his statistic team to give to the production department the data on the number of phones manufactured over the 17 months.. The data collected are as follows: Months 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 REQUIRED # of phones produced 2045 1566 1207 4563 5052 3465 2542 4134 3567 5163 4563 7453 2621 4772 4563 5052 2846 1. Calculate the following using the data provided on the table: a. the mean b. median c. mode 2. Find the Quartile 1, Quartile 3 and inter-quartile of the phones produced 3. Why is the quartile important? What purpose does it serve? 4. Why is median preferred to mean in certain circumstances? 5. How do we call data when Mode >Median >Mean and show with a diagram how such distribution looks? 6. Explain and compare parameters and statistics.
In the data set below, what is the upper quartile? 6 6 6 6 7 7 8 8 9 9 9 Submit