Explanation

Explanation

The coefficient of variation (CV) is defined as:

(Standard Deviation / Mean) × 100

This formula expresses the standard deviation as a percentage of the mean.

Explanation

1. Descriptive Statistics:

• Deals with summarizing and presenting data (e.g., charts, averages).

2. Inferential Statistics:

• Involves making predictions or inferences about a population based on a sample.

Explanation

For categorical variables like "Gender" (e.g., Male/Female), mean and median are not applicable.

Mode is the most appropriate measure, as it identifies the most frequently occurring category.

Explanation

اس کی بیماری اسے بستر تک محدود کر دیتی ہے۔

Explanation

• Energy
• Momentum
• Charge

Explanation

The mass of one mole of electrons is 0.55g.      

- Mass of one electron ≈ 9.109 × 10⁻³¹ kg

- 1 mole of electrons = 6.022 × 10²³ electrons

- So, mass of 1 mole of electrons ≈  

  9.109 × 10⁻³¹ kg × 6.022 × 10²³ ≈ 5.48 × 10⁻⁴ kg ≈ 0.548 g

So the correct value is about 0.55 g

Explanation

 A device based on the photoelectric effect is called a photodiode. 

 A photodiode is a semiconductor device that converts light into electrical current by absorbing photons and generating electron-hole pairs, essentially utilizing the photoelectric effect. 

Explanation

The third quartile (Q3) is the value below which 75% of the data falls.

Quartiles divide data into four equal parts, and Q3 marks the 75th percentile.

Additional Information:

Quartiles divide an ordered data set into four equal parts (quarters). We use subscript notation to label the quartiles: Q1, Q2, and Q3.

The first quartile, Q1, is 1/4 (or 25%) of the way through the data – the lower quartile.

The second quartile, Q2, is 1/2 (or 50%) of the way through the data – the median.

The third quartile, Q3, is 3/4 (or 75%) of the way through the data – the upper quartile.

Example data:

3, 4, 4, 5, 6, 8, 10

LQ (Q1): 4

Median (Q2): 5

UQ (Q3): 8

Explanation

Silicon is the most widely used material in semiconductor devices due to its:

• Abundance in nature

• Suitable electrical properties

• Excellent thermal stability

• Formation of a stable oxide layer (SiO₂), which is useful in device fabrication

While germanium was used in early semiconductors and gallium nitride is used in high-power or high-frequency applications, silicon remains the industry standard.