Based on information on 1,000 randomly selected fields about the tenancystatus of the cultivation of these fields and use of fertilizers, collected in an agro-economicsurvey, the following classification was noted :OwnedRentedTolalUsing fertilizersNot using tertilizers41618460064336400Total4805201,000Would you conclude that owner cultivators are more inclined towards the use of fertilizers at5% level ?Carry out the chi-square test as per testing procedure.

Answered: Image /qna-images/answer/927f8a0b-22e0-416e-9f17-086cd84b3195.jpg

Answered: Based on information on 1,000 randomly…

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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6.34 Barking deer. Microhabitat factors associated with forage and bed sites of barking deer in Hainan Island, China were examined. In this region woods make up 4.8% of the land, cultivated grass plot makes up 14.7%, and deciduous forests make up 39.6%. Of the 426 sites where the deer forage, 4 were categorized as woods, 16 as cultivated grassplot, and 61 as deciduous forests. The table below summarizes these data.39 Woods Cultivated grassplot Deciduous forests Other Total 4 16 61 345 426 (a) Write the hypotheses for testing if barking deer prefer to forage in cer- tain habitats over others. (b) What type of test can we use to answer this research question? (c) Check if the assumptions and conditions required for this test are sat- isfied. (d) Do these data provide convincing evidence that barking deer prefer to forage in certain habitats over others? Conduct an appropriate hypoth- esis test to answer this research question. Photo by Shrikant Rao (http://flic.kr/p/4Xjdkk) CC BY 2.0…
Undertake a survey of residents opinions regarding the siting of a new supermarket in an inner city suburb (estimated catchment population 106619 at the last census). The age and gender distribution of the catchment population at the last census in listed below: Age group Gender 0-5 6-120 21-27 28-32 33-44 45-60 61-74 75+ Males 3408 7143 4582 8356 9012 11992 4072 2584 Females 3321 6223 6482 8160 8250 9002 9344 4688 a) Devise a quota for a quota sample using these data.
A study was conducted at a local college to analyze the average cumulative GPAs of students who graduated last year. In each of the following situations, identify the population, Statistic, Parameter, Variable, Data and the Sample. a) all students who attended the college last year b) the cumulative GPA of one student who graduated from the college last year c) 3.65, 2.80, 1.50, 3.90 d) a group of students who graduated from the college last year, randomly selected e) the average cumulative GPA of students who graduated from the college last year f) all students who graduated from the college last year g) the average cumulative GPA of students in the study who graduated from the college last year
Ten countries were randomly selected from the list of 129 countries in theCountry. The countries are compared with respect to their gross nationalproduct per capita, an indicator of the average income level of each country.Researchers have found that people in countries with higher income levelstend to live longer than do people in countries with lower income levels.In addition, birth rates tend to be higher in countries with lower incomes,with birth rates declining as countries become better off economically. a. Use this data to determine the Spearman rank correlation of GNP with(i) life expectation, and (ii) the birth rate. b. Test to determine whether the correlation of ranks is statisticallysignificant at the 0.05 level of significance.
2) Consider the following data from a hypothetical case control study examining the relationship between tanning bed use in young adulthood and risk of melanoma Cases 688 196 History of Tanning Bed Use Yes No Controls 288 864 a) Name the appropriate measure of association for estimating the relative risk of melanoma, comparing tanning bed users (exposed) to nonusers (reference category). Calculate this measure and provide a brief interpretation of your answer b) Assume that this relationship is causal. Among young people who use tanning beds, what proportion of melanoma risk could be eliminated by banning tanning bed use in young adults? c) If 4% of all young adults use tanning beds, what proportion of melanoma risk could be eliminated from the overall general population by banning the use of tanning beds in young adults?
c. Five-Number Summary d. Distribution characteristics (positively or negatively skewed)
Answer the following question.
5
Determine whetherthe underlined valueisa parameter ora statistic. a. According to a national survey on cigarette addiction, 10% of respondentssmokeat least 5cigarettesa day within the past 3months. b. A study of 6,076adults who usepublic toiletsin Metro Manila found that 12%of them did not wash theirhands before leaving the toilet. c. An interview conducted with 100 females that are at least 20 years old in Metro Manila reveals that 20% of them know the minimum age requirement for a president candidate.
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?
A Quality Analyst wants to construct a control chart for determining whether five machines, all producing the same product, are under control with regard to a particular quality variable. Accordingly, four units of putputs from each machine are collected: Machine Measurement Measurement Measurement Measurement 1 3 4 M1 317 304 309 321 M2 343 326 354 340 M3 316 305 334 325 M4 299 337 325 304 M5 352 304 349 336 Does this process appear to be out of control? If yes, identify a machine using the factors of three sigma control limits. O a. M3 O b. Process is in Control O c. M2 O d. M4 O e. M1 O f. M5
The association between occurrence of convictions and family income was examined by following a cohort of 395 boys for about 20 years, starting at age 8-9. The following table shows number of convictions with respect to three family income brackets: a)What type of table is this? b) Display the same data using a mosaic plot. c) What type of variable is income level? How should this affect your graph? d) By viewing the table and the graph, describe any apparent association between income and later convictions. e) Does the table or the graph better reveal the association between convictions and income? Pls help and explain all parts correctly, thank you

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