Biology HL
4
Chapters
553
Notes
Theme A - Unity & diversity
Theme B - Form & Function
Theme C - Interaction & Interdependence
Theme D - Continuity & Change
Biology HL

# Insightful COVID-19 Data Evaluation WHO Findings

357 words
Last edited on 14th Jun 2024

## Key Concept - Evaluating Data 🔍

• Evaluation: An appraisal that assesses the strengths and limitations of evidence.
• Example: Data about COVID-19 from the World Health Organization (WHO). Questions to ponder
• How did countries differ in reducing COVID-19 infections?
• Which countries were best at preventing COVID-19 deaths?
• Did a country's wealth affect its success in fighting COVID-19?

## Math Time How to Work with Percentages 🔢

• Finding Percentages

• Formula percentage$$= \frac {first\ number}{second\ number} × 100$$
• Real World Example: If 5 students out of a class of 20 got A's, the percentage of students who got A's is $$\frac {5}{20}×100$$.
• Calculating Percentage Change

• Formula: ercentage change$$= \frac {final\ number - initial\ number}{initial\ number} ×100$$
• Real World Example: If you had $10 and now have$15, the percentage increase is $$\frac {15−10}{10}×100$$.
• Finding Percentage Difference

• Formula (using number A as reference)
• percentage difference=number A - number Bnumber Apercentage difference$$= \frac {number A\ - number B}{number A}​$$
• Remember!: The result can differ if you use number B as reference.
• Real World Example: If one store sells a game for $50 and another for$40, the percentage difference, using the first store as a reference, is $$\frac {50-50}{50}×100$$.

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Biology HL

# Insightful COVID-19 Data Evaluation WHO Findings

357 words
Last edited on 14th Jun 2024

## Key Concept - Evaluating Data 🔍

• Evaluation: An appraisal that assesses the strengths and limitations of evidence.
• Example: Data about COVID-19 from the World Health Organization (WHO). Questions to ponder
• How did countries differ in reducing COVID-19 infections?
• Which countries were best at preventing COVID-19 deaths?
• Did a country's wealth affect its success in fighting COVID-19?

## Math Time How to Work with Percentages 🔢

• Finding Percentages

• Formula percentage$$= \frac {first\ number}{second\ number} × 100$$
• Real World Example: If 5 students out of a class of 20 got A's, the percentage of students who got A's is $$\frac {5}{20}×100$$.
• Calculating Percentage Change

• Formula: ercentage change$$= \frac {final\ number - initial\ number}{initial\ number} ×100$$
• Real World Example: If you had $10 and now have$15, the percentage increase is $$\frac {15−10}{10}×100$$.
• Finding Percentage Difference

• Formula (using number A as reference)
• percentage difference=number A - number Bnumber Apercentage difference$$= \frac {number A\ - number B}{number A}​$$
• Remember!: The result can differ if you use number B as reference.
• Real World Example: If one store sells a game for $50 and another for$40, the percentage difference, using the first store as a reference, is $$\frac {50-50}{50}×100$$.

## Unlock the Full Content!

Dive deeper and gain exclusive access to premium files of Biology HL. Subscribe now and get closer to that 45 🌟