Computer Science

What is the statistical name given to the removal or correction of apparently incorrect values from a table or spreadsheet?
Circle your answer.

Circle the word that completes this sentence correctly.
This diagram shows data with a negative __________ .

Which of these sample sizes from a large population gives the most reliable sample?
Choose your answer.

Antonio makes and sells flower displays. He keeps a record of each display he makes. Below is one of his completed records.

Write down one qualitative variable from the record.

Using the record from the previous question, write down one quantitative variable.

Is your quantitative variable discrete or continuous? Tick a box.

The table shows the number of flowers in Antonio's most recent display.
Represent the data in a pictogram.
Key: [Symbol] represents 4 flowers

The tally chart shows the number of flowers in a different display.
Antonio says there are exactly twice as many roses as daisies.
Is he correct? Tick a box. Show your working.

The data show donations to a charity shop and the number of shoppers visiting the shop for each of 12 months in 2019. Jorja uses the data to draw the statistical diagram shown.
Complete the diagram by inserting the three things that are currently missing.

Danni records the number of bedrooms and the number of televisions in 11 houses. She has these data that she needs to show as a graph or chart.
Which single graph or chart would be best to represent the data?
choose your answer.

A map uses different shades of colour to show the population density in different regions of a country.
What is the name of this type of map?

Sol decides to find the actual birth rates for a selection of countries. He says, “This is primary data as it is me who is going on the Internet to find it.”
Is Sol correct? Tick a box and give a reason for your answer.

In fact, Sol had misread the Honduras value and it should have been 22.8.
Use this value and the table to complete the bar chart for the data.
You will need to complete the labels for the axes.

Tate is going to play a game at a fair. The game has a 5 by 5 grid and behind some of the 25 squares are prizes.
Tate decides he wants to pick one square at random.
Describe how he could use cards numbered 1 to 25 to do this.

Look at Table 1 in the Data Sheet.
Use the grid provided to draw a percentage composite bar chart for the two years 2008 and 2018.
Show any calculations you make.

In Northtown, there is a multiscreen cinema, mainly showing popular films. Lopez is the manager of a new cinema about to open in the town. He wants to know the popularity of films with different certificates.
Should Lopez use primary or secondary data to gather this information?
Tick a box and give a reason for your answer.

The pie chart shows information about the source of UK food in 2007.
Write down two criticisms of the diagram.

Luton is an industrial town. The population pyramid shows the number of males living in Luton in 1851. The population values are rounded to the nearest hundred.
The table shows the number of females living in Luton in 1851.
Complete the population pyramid to show the number of females living in Luton in 1851.

Which of these diagrams could be suitable for displaying raw discrete data?

The graph shows the values for Downloads and some of the values for Streaming. Use the values for Streaming from the table to complete the graph.

A vet keeps records of the mass and height of each animal he has registered. The table shows the masses and heights of 9 adult dogs which are of the Vizsla breed. The scatter graph shows the information for the first 6 dogs. Complete the diagram, plotting the points for the last 3 dogs.

Use the values from part 6(b) to help you draw a line of best fit on the diagram.

100 students go to London for a weekend on a school trip. On one afternoon, students can choose to go to a theatre (T) or visit a museum (M) or do neither.

• 16 chose to do neither.
• Three times as many chose the theatre as chose the museum.
  Complete the Venn diagram.

Sanders draws this choropleth map to represent the number of chickens in each square. Write down three errors that Sanders has made.

On the grid draw a cumulative frequency diagram for the data.

The cumulative frequency diagram below shows information about a sample of 100 trees in a large field. The shortest tree in the field is 1 m in height. The tallest tree in the field is 27 m in height. Use this information and the cumulative frequency diagram to complete a box plot for the trees in the field.

In Vikram's village, there are 600 people. He has sampled 50 of them. 32 of this sample would like a gym to be built. Assume the sample is representative. How many people would you expect, from the whole village, would like a gym to be built?

Here is one of the questions from Tom's study. Write down two different problems with this question.
Question: "How old are you? Tick a box: [ ] under 21 [ ] 21-50 [ ] 51-60 [ ] 61-70"

Here is an open question from Tom's study: "How much do you earn? £____". Write down a problem with this question.

Tom reads that HS2 will link 29 stations. He decides to take a random sample of 5 of the stations where he can ask people for their opinions. Briefly describe a way Tom could achieve this.