Survival Analysis: Kaplan-Meier and Cox - Page 29

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328333 MCQs Page 29

Topic Notes: Statistics

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Practice Statistics MCQs to prepare for CSS, PMS, FPSC, PPSC, SPSC, KPPSC, BPSC, NTS, and university entry tests in Pakistan. This section covers key theoretical concepts, syllabus topics, and repeated past paper questions related to Statistics.

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281

Read the passage: 'Social media algorithms prioritize content that maximizes user engagement, which frequently favors sensationalist, emotionally charged, and polarizing material. This algorithmic amplification distorts public discourse by creating ideological echo chambers and accelerating the dissemination of unverified misinformation.' What is the primary assertion of the text?

A Social media platforms have successfully eliminated ideological polarization online. B Engagement-driven algorithms distort public discourse by promoting sensationalism, polarization, and misinformation. C Users share factual educational content far more often than emotionally charged posts. D Unverified misinformation spreads primarily through offline interpersonal communication channels.

282

Read the passage: 'Soil is a non-renewable resource on human timescales; generating just a few centimeters of fertile topsoil requires hundreds of years of weathering and organic decay. Current rates of agricultural erosion, driven by intensive tillage and deforestation, are depleting topsoil vastly faster than natural pedological processes can replenish it.' What is the author's central warning?

A Chemical fertilizers can fully regenerate depleted topsoil within a few agricultural seasons. B Human agricultural practices are depleting non-renewable topsoil at an unsustainable rate compared to its slow natural formation. C Deforestation accelerates topsoil formation by exposing mineral bedrock to rain. D Tillage practices protect agricultural fields from natural wind erosion.

283

Read the passage: 'Remote work models established during the pandemic proved that knowledge workers can maintain high productivity outside corporate offices. Nevertheless, prolonged remote work can erode organizational culture, weaken spontaneous innovation from in-person collaboration, and blur boundaries between professional obligations and personal life.' Which statement best summarizes the main idea?

A Corporate productivity declines steeply whenever employees work outside physical headquarters. B Remote work sustains individual productivity while introducing notable cultural, collaborative, and lifestyle challenges. C Employees universally prefer returning to traditional corporate offices full-time. D In-person collaboration prevents professionals from establishing work-life boundaries.

284

Read the passage: 'Indigenous languages encapsulate centuries of accumulated ecological knowledge, oral history, and unique cultural worldviews. When an endangered indigenous tongue ceases to be spoken, humanity loses not merely a linguistic communication system, but an irreplaceable repository of ethnobotanical wisdom and cultural heritage.' What is the author's primary argument?

A Written linguistic grammars can easily preserve the full depth of dying spoken dialects. B The extinction of indigenous languages represents an irreversible loss of cultural and ecological knowledge. C Ethnobotanical research should focus exclusively on dominant international languages. D Indigenous languages naturally disappear because modern vernaculars are more grammatically efficient.

285

Read the passage: 'Nuclear fusion promises virtually limitless, clean energy without producing long-lived radioactive waste or greenhouse gas emissions. However, achieving net energy gain requires confining superheated plasma at temperatures exceeding one hundred million degrees Celsius, an engineering milestone that has eluded commercial scalability for decades.' What is the main idea?

A Nuclear fusion is an established, commercially viable replacement for fossil fuels today. B Nuclear fusion offers an ideal clean energy solution, but faces immense, unresolved engineering hurdles for practical use. C Confining plasma at extreme temperatures generates dangerous levels of toxic greenhouse gases. D Fission reactors produce higher energy output with fewer radioactive waste products than fusion.

286

Read the passage: 'The sharing economy, popularized by digital peer-to-peer lodging and ridesharing platforms, enables consumers to monetize underutilized personal assets like spare rooms and vehicles. However, it has disrupted traditional hospitality and taxi sectors while sparking debate over municipal tax obligations and the absence of employee protections for gig workers.' What is the central focus of the text?

A The gig economy has rendered traditional municipal taxation systems completely obsolete. B Platform-based asset sharing provides flexible economic opportunities while generating regulatory, industry, and labor disputes. C Ridesharing drivers receive greater healthcare benefits than traditional corporate employees. D Peer-to-peer lodging platforms have lowered residential home purchasing costs.

287

Read the passage: 'Honeybee populations worldwide face severe colony collapse disorder, an issue driven by a combination of pesticide exposure, habitat fragmentation, parasitic Varroa mites, and climate change. Because bees pollinate roughly one-third of the crops consumed by humans, their decline threatens global agricultural stability and food security.' What is the main point of this passage?

A Varroa mites are the sole contributing factor behind global pollinator losses. B Colony collapse disorder results from multiple interacting stressors and poses a major threat to human food supplies. C Modern agricultural crop production does not rely on insect pollination. D Pesticide regulations have successfully reversed the decline in honeybee populations.

288

Read the passage: 'Urban gentrification frequently revitalizes crumbling physical infrastructure, lowers local crime rates, and attracts private commercial investment into historically neglected districts. Yet, this economic influx simultaneously inflates property values and rental rates, displacing longtime lower-income residents and eroding unique neighborhood cultural identities.' What is the primary theme of the paragraph?

A Gentrification exclusively harms metropolitan economies without offering civic improvements. B Urban revitalization through gentrification produces physical and economic improvements alongside social displacement and cultural disruption. C Property tax incentives completely prevent resident displacement in gentrifying neighborhoods. D Lower-income residents prefer to relocate away from modernized commercial districts.

289

Read the passage: 'Autonomous vehicles rely on artificial intelligence, LiDAR, and computer vision to navigate road networks without human intervention. While proponents anticipate dramatic declines in traffic accidents caused by human error, widespread deployment hinges on resolving complex legal liability frameworks, ethical programming dilemmas, and cybersecurity vulnerabilities.' What is the main idea?

A Autonomous vehicles will eliminate all traffic accidents immediately upon release. B Self-driving vehicle technology holds safety potential, but faces significant ethical, regulatory, and technical obstacles. C LiDAR systems are too unreliable to support autonomous passenger navigation. D Human drivers remain legally liable for all collisions involving autonomous algorithms.

290

Read the passage: 'Psychological resilience is not an inherent, immutable personality trait; rather, it represents a dynamic suite of behavioral adaptations that individuals can develop. Practices such as cognitive reframing, maintaining strong social connections, and cultivating realistic optimism enable individuals to recover from acute trauma and chronic adversity.' What is the central claim of this excerpt?

A Resilience is an innate biological attribute that cannot be altered or acquired. B Psychological resilience is a learnable set of adaptive behaviors and coping mechanisms. C Trauma victims can only build resilience through professional medical therapy. D Realistic optimism is the sole factor required to overcome extreme psychological trauma.

Survival Analysis: Kaplan-Meier and Cox Proportional Hazards MCQs

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