Daily Practice · Foundation
November 2012 5-a-day
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The batch download puts all 2 tiers' November 2012 sheets in a single PDF, each tier behind its own divider page - 60 sheets in one file.
Every sheet in November 2012
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st November 2012A school of 600 students wants a sample of 30. A teacher decides to only survey students in her own class of 30. State one problem with this method.
- 2nd November 2012A scientist tests a new plant food but only uses it on the healthiest-looking plants. Explain why this is a flawed design.
- 3rd November 2012The frequencies for four class intervals are 6, 9, 11, 4. Find the total number of data values.
- 4th November 2012In a pie chart representing 120 people, 30 people chose 'Yes'. What angle represents 'Yes'?
- 5th November 2012A Venn diagram shows 40 people: 22 own a car, 15 own a bike, 6 own both. Find the probability a random person owns neither.
- 6th November 2012A scatter graph shows points scattered with no clear pattern. What type of correlation does this show?
- 7th November 2012A researcher finds that towns with more fire engines have more fire damage, and concludes that fire engines cause fire damage. Identify the flaw in this reasoning and suggest the true common cause.
- 8th November 2012Two data sets give correlation coefficients rs = 0.6 and rs = -0.9. Which shows the stronger relationship?
- 9th November 2012What is a pilot survey?
- 10th November 2012Is 'height of a plant in cm' discrete or continuous data?
- 11th November 2012Three groups have 8 items with mean 10, 12 items with mean 15, and 5 items with mean 20. Find the combined mean.
- 12th November 2012Using the survey in the previous question (Red 6, Blue 9, Green 4, Yellow 5), which colour is the mode?
- 13th November 2012A bar chart uses a scale where each small square represents 2 people. A bar is 7 squares tall. How many people does the bar represent?
- 14th November 2012A stem-and-leaf row, with key '3|1 means 31', is '3|0 2 4 4 7 9'. Find the median of these six values.
- 15th November 2012A frequency table has class frequencies 5, 9, 14, 7 for four consecutive classes. Find the cumulative frequency of the third class.
- 16th November 2012A choropleth map of rainfall uses two different hues (for example yellow to red) rather than one hue getting darker. Why can this style of shading be a problem?
- 17th November 2012In a class of 30 students, a student's mark is at the 90th percentile. Roughly how many students scored less than or equal to that mark?
- 18th November 2012Data on 200 students' exam scores is in a spreadsheet. Give one advantage of using a spreadsheet rather than calculating the mean and range by hand.
- 19th November 2012Which stage of the statistical enquiry cycle comes immediately after collecting the data?
- 20th November 2012A student uses figures from a government website for her project. Is this primary or secondary data?
- 21st November 2012Find the median of: 3, 5, 8, 10.
- 22nd November 2012Two rows of a pictogram show 4.5 symbols and 3.5 symbols, with a key of 1 symbol = 20 pounds. Work out the combined total for both rows.
- 23rd November 2012Using two fair six-sided dice added together, find P(total is 7).
- 24th November 2012Two frequency polygons are drawn on the same axes for boys' and girls' test scores. What feature of the graphs shows which group generally scored higher?
- 25th November 2012A time series graph generally slopes upward from left to right over several years. What is this called?
- 26th November 2012Out of 600 drivers who used a phone while driving, 24 had an accident that year, compared with 9 out of 900 drivers who did not use a phone. Calculate the risk of an accident for each group.
- 27th November 2012In a survey of 40 students, 25 like Maths. Of those 25, 18 also like Science. Find P(likes Science given likes Maths).
- 28th November 2012A bar chart's vertical axis runs from 0 to 10 in equal steps of 2. Is this axis likely to be misleading?
- 29th November 2012The table shows ages, in years, of 50 people at a gym: 10-20 (freq 6), 20-30 (freq 18), 30-40 (freq 16), 40-50 (freq 10). Estimate the mean age.
- 30th November 2012Give one reason why the response options '0-5, 5-10, 10-15' are a poor choice for hours of homework.