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Statistics QUESTION #1967

The standard deviation of a sampling distribution of a statistic is specifically called:

Standard error✔️
Non-sampling error
Type-I error
Type-II error

Correct Answer Logic:

The standard deviation of a sampling distribution is called the Standard Error (SE). For example, the standard error of the mean is $SE_{\bar{X}} = \dfrac{\sigma}{\sqrt{n}}$.

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Others section QUESTION #4721

Question 1562

What is the official currency of China?

Rouble
Yen
Yuan (Renminbi)✔️
Won

Correct Answer Logic:

The official currency of China is the Renminbi (RMB), with the base unit called the Yuan. The Rouble is Russian, Yen is Japanese, and Won is Korean.

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Agronomy QUESTION #2045

Question 1563

The 'critical concentration' of a nutrient in plant tissue is defined as:

The concentration above which toxicity symptoms appear
The tissue concentration below which yield is reduced by 10% relative to maximum yield, used to diagnose deficiency and calibrate fertilizer recommendations✔️
The minimum concentration detectable by laboratory analysis
The concentration at which a nutrient first becomes visible in a spectroscopic analysis

Correct Answer Logic:

Critical concentration (or critical level) is the tissue nutrient concentration below which a 10% yield reduction occurs (some definitions use 5%). It is determined through nutrient response experiments and tissue analysis. It forms the basis for plant tissue testing diagnostic programs and fertilizer recommendations in modern agronomy.

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Psychology QUESTION #1457

Question 1564

Which gland is known as the \"master gland\" of the endocrine system, regulating other glands and hormones in the body?

Thyroid gland
Pineal gland
Adrenal gland
Pituitary gland✔️

Correct Answer Logic:

The pituitary gland (located at the base of the brain, controlled by the hypothalamus) is called the 'master gland' because it secretes hormones that regulate the activity of other endocrine glands — including the thyroid, adrenal glands, and gonads. It has two lobes: the anterior pituitary (produces GH, TSH, ACTH, FSH, LH, prolactin) and posterior pituitary (releases ADH and oxytocin).

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Urdu QUESTION #5215

Question 1565

دنیا میں زبانوں کے کتنے بڑے خاندان ہیں؟

5
14✔️
3
8

Correct Answer Logic:

ماہرینِ لسانیات کے مطابق دنیا میں زبانوں کے تقریباً 14 بڑے خاندان ہیں۔

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Chemistry QUESTION #478

Question 1566

Al?F?SiO? is named as

Gibbsite
Emerald✔️
Bauxite
Cryolite

Correct Answer Logic:

This is beryl/emerald composition

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Professional QUESTION #1861

Question 1567

Appointment by transfer shall be made from amongst persons holding appointment on a regular basis in posts in which pay scales?

One scale lower
One scale higher
The same basic pay scale or equivalent/identical posts✔️
Any scale at discretion of authority

Correct Answer Logic:

Rule 9 states appointments by transfer shall be made from persons holding appointment on a regular basis in posts in the same basic pay scale or equivalent to or identical with the posts to be filled.

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Logical Reasoning QUESTION #3945

Question 1568

Select the pair with a similar relationship to IMPLICATE : COMPLICATE

Vitality : Inevitable✔️
Empathy : Sympathy
Importune : Construct
Imply : Simplify

Correct Answer Logic:

3

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City and Regional Planning QUESTION #5008

Question 1569

In water supply planning, what is the recommended per capita water demand for residential areas in developing countries?

50-80 liters/day
100-150 liters/day✔️
200-250 liters/day
300-350 liters/day

Correct Answer Logic:

WHO and planning standards recommend 100-150 liters per capita per day (lpcd) for developing countries, covering drinking, cooking, bathing, and sanitation. Developed countries typically use 200-350 lpcd due to lifestyle differences and water-intensive appliances.

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Pharmacology and Toxicology QUESTION #3858

Question 1570

Which of the following agents does NOT have antiemetic properties?

Chlorpromazine
Domperidone
Oxybutynin✔️
Metoclopramide

Correct Answer Logic:

Oxybutynin is an anticholinergic agent used for urinary incontinence and has no antiemetic role. Chlorpromazine, domperidone, and metoclopramide are all recognised antiemetics.

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Urdu QUESTION #5196

Question 1571

شیطان کی آنت ہونا محاورے کا کیا مطلب ہے؟

بھوکا ہونا
شرارتی ہونا
طویل ہونا✔️
ان میں سے کوئی نہیں

Correct Answer Logic:

شیطان کی آنت ہونا محاورے کا مطلب ہے کسی چیز کا بہت طویل ہونا۔

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Mathematics QUESTION #1311

Question 1572

For the Gauss-Seidel method to be guaranteed to converge, the coefficient matrix should be:

Symmetric
Orthogonal
Diagonally dominant✔️
Singular

Correct Answer Logic:

A sufficient condition for convergence of Gauss-Seidel (and Jacobi) is that the matrix is strictly diagonally dominant: $|a_{ii}|>\sum_{j\neq i}|a_{ij}|$ for each row $i$. Diagonal dominance ensures the iteration converges from any starting point.

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Urdu QUESTION #5160

Question 1573

تصادق حسین خالد، میراجی اور این ایم راشد میں کیا مشترک ہے؟

مزاح نگاری
معری نظم
آزاد نظم✔️
ان میں سے کوئی نہیں

Correct Answer Logic:

تصادق حسین خالد، میراجی اور این ایم راشد تینوں آزاد نظم کے علمبردار شعراء تھے۔

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Basic Mathematics QUESTION #4624

Question 1574

What is $\frac{1}{2} + \frac{1}{3} + \frac{1}{6}$?

$\frac{3}{6}$
$1$✔️
$\frac{1}{11}$
$\frac{2}{3}$

Correct Answer Logic:

$\frac{3}{6} + \frac{2}{6} + \frac{1}{6} = \frac{6}{6} = 1$

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Boilers Mechanical Engineering QUESTION #4077

Question 1575

'Phosphate Treatment' in a boiler helps to:

Make the water blue
Keep scale-forming minerals in a soft, non-adherent 'sludge' form✔️
Increase the pressure
Clean the exterior

Correct Answer Logic:

The sludge is then removed via the blow-down.

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English QUESTION #2705

Question 1576

Identify the correct word: 'The principal gave his ___ to the plan.'

Assent✔️
Ascent
Accent
Ascend

Correct Answer Logic:

'Assent' means agreement; 'ascent' means climbing up.

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Agronomy QUESTION #2056

Question 1577

The plant-available water capacity (PAWC) of a soil is correctly expressed as:

The moisture content at field capacity only
$PAWC = \theta_{FC} - \theta_{PWP}$, where $\theta_{FC}$ is volumetric water content at field capacity ($-33$ kPa) and $\theta_{PWP}$ is at permanent wilting point ($-1500$ kPa)✔️
The total porosity of the soil minus bulk density
The gravitational water fraction that drains within 48 hours of saturation

Correct Answer Logic:

PAWC represents the reservoir of water accessible to plant roots. It equals the difference in volumetric water content between field capacity (−33 kPa, where drainage becomes negligible) and permanent wilting point (−1500 kPa, where plants cannot extract water). Sandy soils have low PAWC; loam soils have the highest.

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Others section QUESTION #4804

Question 1578

Which country permanently abolished its military forces by constitutional provision?

Costa Rica✔️
Japan
Iceland
Panama

Correct Answer Logic:

Costa Rica permanently abolished its military in 1948 under President José Figueres Ferrer. Article 12 of the Costa Rican Constitution prohibits the army as a permanent institution.

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