स्नातकोत्तर मेडिकल प्रवेश (MECEE-PG)
स्नातकोत्तर मेडिकल प्रवेश (MECEE-PG)
MECEE-PG – MD/MS/MDS Entrance · २,८६५ प्रश्न
२,८६५ प्रश्न उपलब्ध। मोड छान्नुहोस्:
MD/MS प्रवेश: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
-
Blood pressure of the same group of patients is measured before and after a drug. The appropriate test to compare the means is:
सही उत्तर: ख) Paired t-test
Paired t-test is used when two measurements are made on the same subjects. The unpaired t-test is for two independent groups.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The chi-square test is most appropriately used to:
सही उत्तर: क) Compare proportions in qualitative (categorical) data
Chi-square tests association between categorical variables using observed and expected frequencies. Comparing means of more than two groups uses ANOVA.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
In a normal distribution, approximately what proportion of observations lie within mean ± 2 standard deviations?
सही उत्तर: घ) 95.4%
About 68.3% lie within ±1 SD, 95.4% within ±2 SD and 99.7% within ±3 SD. Many tables round mean ±1.96 SD to 95%.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
For a stable chronic disease, the relationship between prevalence (P), incidence (I) and mean duration (D) is:
सही उत्तर: ग) P = I × D
Prevalence equals incidence multiplied by mean duration when conditions are stable. Thus a longer duration (e.g. better survival without cure) increases prevalence.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A screening test gives 90 true positives and 30 false positives. Its positive predictive value is:
सही उत्तर: ख) 75%
PPV = TP/(TP + FP) = 90/120 = 75%. PPV depends on disease prevalence, unlike sensitivity and specificity.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
In a case-control study: exposed cases = 40, unexposed cases = 60, exposed controls = 20, unexposed controls = 80. The odds ratio is:
सही उत्तर: क) 2.67
OR = ad/bc = (40 × 80)/(60 × 20) = 3200/1200 = 2.67. 2.00 results from dividing exposure proportions (40%/20%), which is not the odds ratio.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
In a cohort study, the incidence of lung cancer is 30 per 1000 among smokers and 10 per 1000 among non-smokers. The attributable risk per cent among smokers is:
सही उत्तर: घ) 66.7%
AR% = (Ie − Iu)/Ie × 100 = (30 − 10)/30 × 100 = 66.7%. 20 per 1000 is the absolute attributable risk, not the percentage.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The measure of association usually calculated in a case-control study is:
सही उत्तर: ग) Odds ratio
Because incidence cannot be measured in case-control studies, the odds ratio is used as an estimate of relative risk. Attributable risk needs incidence data from a cohort study.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The chemical most commonly used as a coagulant in rapid sand filtration is:
सही उत्तर: ख) Alum (aluminium sulphate)
Alum is added for coagulation and flocculation before rapid sand filtration. Potassium permanganate is an older well disinfectant, not a coagulant.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
In a slow sand filter, the biologically active 'vital layer' is known as:
सही उत्तर: क) Schmutzdecke
The Schmutzdecke is a slimy layer of algae, bacteria and plankton on top of the sand bed and is the heart of slow sand filtration. It takes a few days to form when a new filter is started (ripening).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
नमस्ते! पाठ्यक्रम, सामान्य ज्ञान, भाषा परीक्षा वा कुनै प्रश्नको उत्तर बुझ्न सोध्नुहोस्।
AI ले गल्ती गर्न सक्छ। महत्वपूर्ण कुरा आधिकारिक स्रोतमा जाँच्नुहोस्।