1. In preparing a national promotional campaign to raise funds for Operation feed thepoor, the organizing charity examined previous records of donations to establish if ageof donor is a factor in the monetary size of the donations received from a donor. Theirrecords were arranged into the following contingency table:Age groupSize of20 - 3435 - 4950 -64Over 64donationAbove R10025404746R50 – R10069517457Under R5036291937Test at 1% level of significance if the monetary size of the donation received fromdonor depend on the age of the donor

Introduction - chi-square test χ2=∑(Oi-Ei)2Eiwhere ,Oi=observed frequency Ei=expected frequency…

Answered: 1. In preparing a national promotional…

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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1. Dick Hoover, owner of Modern Office Equipment, is concerned about freight costs and clerical costs incurred on small orders. In an effort to reduce expenditures in this area, he has decided to introduce a discount policy rewarding orders over $40 in the hope that this will cause customers to consolidate a number of small orders into large orders. The following data show the amount per transaction for a sample of 28 customers:10,15,20,25,15,17,41,50,5,9,12,14,35,18,19,17,28,29,11,11,43,54,7,8,16,13,37,18a. Compute the sample meanb. Compute the standard deviationc. Compute the sample varianced. If the policy is successful, will the mean of the distribution increase, decrease, or remain unaffected?e. If the policy is successful, will the standard deviation of the distribution increase, decrease, or remain unaffected?
Chapter 5 In preparation for your discussion post, complete the following: • Research data on the U.S. uninsured population (https://aspe.hhs.gov/sites/default/files/private/pdf/265041/trends-in-the-us- uninsured.pdf B). • Choose one condition for your discussion post about an uninsured group. (For example, In 2019, 22% of Latine individuals under age 65 were uninsured, Figure 4 p.6). For your discussion board post include all of the following: 1. Suppose six individuals, within your criteria, are randomly selected. Show or explain your thinking for each problem. (Note: This is a binomial probability from Section 5.2, they either have insurance or they do not.) A. Let having insurance be a success. State the values of your p, q, and n for your chosen condition. Explain your thinking. (For my example, if 22% do not have insurance, then that is my q (failure) value, my p=0.78, q=0.22, n-6 (6 individuals are randomly selected in this problem). B. Use excel or a T184 to determine the…
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15. Medical School Tuition Listed below in dollars are the annual costs of tuition at the 10 most expensive private medical schools in the United States for a recent year (based on data from U.S. News & World Report). What does this "top 10" list tell us about those costs for the population of all U.S. private medical school tuitions? 57,261 56,784 55,196 54,976 54,653 54,528 54,268 54,050 53,581 53,323 16. California Smokers In the California Health Interview Survey, randomly selected adults are interviewed. One of the questions asks how many cigarettes are smoked per day, and results are listed below for 50 randomly selected respondents. How well do the results reflect the smoking behavior of California adults? 9 10 10 20 40 50 (Plus 44 other values that are all 0)
1. Carefully analyze Tables 2, 3, 4 & 5, and answer the following question. In this study, one exposed group is people who are in the 15-24 age group and had the recent stressor of mental illness. What is the unexposed group for this example? 2. In terms of suicide risk, which stressors affect the elderly (65+) more than other age groups?
3. The director of library services at Fairmont College did a survey of types of books (by subject) in the circulation library. Then she used library records to take a random sample of 4217 books checked out last term and classified the books in the sample by subject. The results are shown below. Subject Area % Books in Circ Library on this Subject No. of Books in the Sample on this Subject Business 32% 1210 Humanities 25% 956 Natural Science 20% 940 Social Science 15% 814 Other Subject 8% 297 Using a 5% level of significance, test the claim that the subject distribution of books in the library fits the distribution of books checked out by students.
1. is the collection of all elements under consideration in a statistical inquiry. A. Statistics C. Population B. Sample D. Data
1. Students from Sandalwood High School were asked, when given the choice between math or English, which class they preferred to take during first period. The data was broken down by gender: 55 males preferred math 52 males preferred English 42 females preferred math 51 females preferred English Part A: Fill in and complete the following contingency table. Circle the largest joint frequency and put a box around the smallest marginal frequency. Sandalwood High School Survey of Preferred First Period Class Math English Total Males Females Total Part B: Which subject was preferred as a first period class and by what percentage? Part C: Males preferred which subject more? Part D: What frequency does 103/200 represent?
The following table provides data on access to running water in the home for a certain developing country in 2006. Use the table to find answers to the questions. Have running water in the home Do not have running water in the home 100% People in Urban Areas 90% 78,359,000 3,265,000 People in Rural Areas 18,559,000 7,217,000 What percent of people in that country have running water in the house? Round answers to the nearest percent and include the % sign in your answer. Note that this is the number of the people that have running water (both in rural an urban areas) divided by the total number of people in the country (107,400,000). BZW
1. Data analysis and manipulation includes methods for gathering, reviewing, analyzing, and drawing conclusions from data. A. Statistics B. Quota sampling C. Distribution D. Probability
According to the following bar graph, hydroelectric and nuclear power combined account for of all energy sources. 6.0 Oil - 38% 5.0 Coal 4.0 26% Gas 23% 3.0 2.0 Hydroelectric 6% Nuclear 01% Geothermal, Solar, Wind, and Wood 6% 1.0 0.0 12 % 38 % 1% 49 %
15 Projected undernourished individuals. In 2020, The FAO, IFAD, UNICEF, WFP, and WHO published a brief .... NOURISH report on the state of food security and nutrition in the world. There were 687.8 million undernourished people in the world in 2019. One of the sections in the report shows the distribution of these people as shown in the following table: Region Africa Asia Northern America and Europe Oceania Latin America and the Caribbean Percentage of undernourished people (%) 36.4 55.4 0.9 0.4 6.9 a. Describe the variable measured in the table. b. These results were displayed in the form of a pie chart. Reconstruct the pie chart from the information given in the table. c. How many of the 687.8 million undernourished people in the world in 2019 were in Africa? d. As Africa has many third world countries, people might expect Africa to have the highest number of undernour- ished people in the world. Does the information in the pie chart, part b, support this contention? Explain why or…

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