Question 7<>Because of the difficulty of weighing a Bear in the woods, researchers caught and measured 20 Bear, recordingtheir weight, neck size, height, length, fur/hair color, and sex. They hoped to find a way to estimate weightfrom the other, more easily determined quantities.Which of the following are quantitative (numerical) variables for this study?SexWeightNeck SizeHeightBearFur/Hair ColorLength

Quantitative variables take only numerical values.

Answered: Because of the difficulty of weighing a…

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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question 18 In California, we need more rain to sustain the health of our natural environment, argriculture, and economic. A group of statistics students in Oxnard College recorded the amount of rain during 2016-2017 school year, measuring the intensity by the inches of rain, and the results were: Inches of Rain 1 2 3 4 5 6 Frequency 0 6 2 5 5 7 The mean (¯xx¯) rain intensity: inches (Please show your answer to 1 decimal place.)The median rain intensity: inchesThe mode rain intensity: inches (Please separate your answers by ',' in the bimodal situation. Enter DNE if there is no mode or if there are more than two modes.)
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PROBLEM 1: The researcher would like to know whether academic performance of students in public school vary according to the board/visual aid used by teachers. For one quarter, different group of students were taught the same lessons using a glass board, white board, black board, and Manila paper. They took a 100-item quarterly test and following results were gathered: ACADEMIC PERFORMANCE OF STUDENTS USING GLASS BOARD ACADEMIC PERFORMANCE OF STUDENTS USING WHITE BOARD ACADEMIC PERFORMANCE OF STUDENTS USING BLACK BOARD ACADEMIC PERFORMANCE OF STUDENTS USING MANILA PAPER 96 90 87 87 84 87 88 79 89 90 86 89 83 95 88 98 85 95 86 97 82 97 85 96 89 96 87 70 90 95 86 73 95 90 87 74 96 90 86 75 Independent Variable: Dependent Variable: Experimental Design: Research Problems: (descriptive): (Inferential)…
Problem 3. The following cross-tabulation (based on GSS18SSDS-B dataset) examines the relationship between AGE (the independent variable) and whether or not one feels discriminated against because of age. We recorded age into four categories: 18-29, 30-39, 40-49, and 50-59. Respondents of all other ages were excluded from the analysis. Age 18-29 30-39 40-49 50-59 Total Respondent feels discriminated because of age Yes Count 26 14 4 19 63 Percent (%) 16.0 6.4 2.1 9.6 8.2 No Count 136 206 183 178 703 Percent (%) 84.0 93.6 97.9 90.4 91.8 Total Count 162 220 187 197 766 Percent (%) 100.0 100.0 100.0 100.0 100.0 What percentage of the sample did not feel they were subject to age discrimination? How many people between the ages of 30 and 39 reported feeling…
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Problem 1In a health survey of 1020 adults in the US, 44% said that they wash their hands after riding public transportation (based on data from KRC Research, http://www.krcresearch.com). What is the population of interest? What is the sample? Is the value 44% a parameter or statistic? What is the level of measurement of the value 44%? Are the numbers of subjects in such surveys discrete or continuous? Problem 2The Financial Times/Harris Poll is a monthly online poll of adults from six countries in Europe and the United States. A January poll included 1020 adults in the United States. One of the questions asked was, “How would you rate the federal bank in handling the credit problems in the financial markets?” Possible responses were Excellent, Good, Fair, Bad, and Terrible (Harris Interactive website, January 2008). What was the sample for this survey? Are the data qualitative or quantitative? Of the respondents in the United States, 10% said the Federal Bank is doing a good…
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As part of the study described in Problem 6, investigators wanted to assess the accuracy of self-reported smoking status. Participants are asked whether they currently smoke or not. In addition, laboratory tests are performed on hair samples to determine presence or absence of nicotine. The laboratory assessment is considered the gold standard, or truth about nicotine consumption. The data are as follows: Nicotine Absent Nicotine Present Self-reported nonsmoker 90 17 Self-reported smoker 10 50 What is the specificity of self-reported smoking status? A)1 B)0.1 C)0.84
Question Number (4)ENGINEERING STATISTICS Civil Engineering

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