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Questions and Answers
A coffee maker costs $79.58. The price increased by 6.2%. What is the new price?
A coffee maker costs $79.58. The price increased by 6.2%. What is the new price?
$84.80
A school had 953 students, but the number decreased by 2.3%. How many students are left?
A school had 953 students, but the number decreased by 2.3%. How many students are left?
931
What is the absolute increase of a price that increased from $1.93 to $2.02?
What is the absolute increase of a price that increased from $1.93 to $2.02?
0.09
What is the percentage increase of a price that increased from $1.93 to $2.02?
What is the percentage increase of a price that increased from $1.93 to $2.02?
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A ticket costs $28.50, but you can buy it online for $12.99. What is the percentage discount?
A ticket costs $28.50, but you can buy it online for $12.99. What is the percentage discount?
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What are the names of the four types of ships that are being counted?
What are the names of the four types of ships that are being counted?
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From the bar chart, how many coast guard ships were built?
From the bar chart, how many coast guard ships were built?
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From the circle chart, what percentage of the ships built were coast guard ships?
From the circle chart, what percentage of the ships built were coast guard ships?
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If 66 ships were built, how many sailboats were built?
If 66 ships were built, how many sailboats were built?
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What is the number of employees in Delfshaven?
What is the number of employees in Delfshaven?
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Which year had the least number of employees?
Which year had the least number of employees?
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What was the highest number of employees?
What was the highest number of employees?
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What is the frequency of children with 0, 1, 2, 3 and 4 children?
What is the frequency of children with 0, 1, 2, 3 and 4 children?
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How many total children do the office staff in Delfshaven have?
How many total children do the office staff in Delfshaven have?
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What does the term 'mode' mean in statistics?
What does the term 'mode' mean in statistics?
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What is the mode in the data: 3, 5, 5, 5, 7, 8, 9, 9, 9?
What is the mode in the data: 3, 5, 5, 5, 7, 8, 9, 9, 9?
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What is the average (or mean) in the data: 3, 5, 5, 5, 7, 8, 9, 9, 9?
What is the average (or mean) in the data: 3, 5, 5, 5, 7, 8, 9, 9, 9?
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How many games did Feyenoord play?
How many games did Feyenoord play?
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What was the average number of goals scored in the 34 games?
What was the average number of goals scored in the 34 games?
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What is the average number of goals scored per game?
What is the average number of goals scored per game?
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In how many games did Feyenoord score 0 goals?
In how many games did Feyenoord score 0 goals?
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How many goals did Feyenoord score in total?
How many goals did Feyenoord score in total?
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In what percentage of games did Feyenoord score 0 goals?
In what percentage of games did Feyenoord score 0 goals?
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What is the relative frequency of scoring 0 goals?
What is the relative frequency of scoring 0 goals?
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What is the median number of goals scored in games?
What is the median number of goals scored in games?
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What is the mode in the data from Feyenoord's goals scored?
What is the mode in the data from Feyenoord's goals scored?
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Study Notes
Calculating Percentage Changes
- A coffee maker costing €79.85 increased in price by 6.2%, resulting in a new price of €84.80.
- A school had 953 students. A year later, the student count decreased by 2.3%, leaving 931 students.
Percentage Changes
- The price of a litre of petrol increased from €1.93 to €2.02, meaning a €0.09 increase.
- This represented a 4.7% price increase.
- A €28.50 entrance ticket to the Dolfinarium offered a €12.99 online discount, providing a €15.51 discount.
- This represented a 54.4% discount.
Histograms and Frequency Tables
- A histogram displays the frequency of values in a dataset.
- Frequency tables show how often each value appears.
- These charts are useful tools for visualizing data.
Measures of Central Tendency
- The mean (average) of a dataset is calculated by summing all the values and dividing by the count of values.
- The median is the middle value when the data is arranged in ascending order. If there's an even number of values, the median is the average of the two middle values.
- The mode is the value that appears most frequently in the dataset.
Data Representation
- Charts like bar graphs and pie charts are used to depict data.
- Pie charts visualize the proportional representation of different categories.
- Bar graphs show the frequency and value of different data categories.
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Description
This quiz covers calculating percentage changes, including price increases and discounts, as well as analyzing data through histograms and frequency tables. It also discusses measures of central tendency like mean and median to better understand datasets.
