Daily Practice · Foundation
August 2013 5-a-day
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The batch download puts all 2 tiers' August 2013 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in August 2013
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 2013Two classes sit the same test. Class P: mean 70, range 10. Class Q: mean 55, range 30. Write a full comparison.
- 2nd August 2013An item has an index number of 88 compared to its base year. State whether the value has increased or decreased, and by what percentage.
- 3rd August 2013An event has a probability of 0.2 of happening. What is the probability that it does not happen?
- 4th August 2013Using the relative frequency from the spinner above, estimate how many times it would land on blue in 300 spins.
- 5th August 2013A spinner has P(win) = 0.3. It is spun twice, independently. Find the probability of winning both times.
- 6th August 2013On a population pyramid, which axis shows the age groups?
- 7th August 2013A box plot shows a long whisker on the left and a short whisker on the right, with the median close to the right of the box. What type of skew does this suggest?
- 8th August 2013A survey of 30 shoppers out of 900 in a store found the mean amount spent was 18.50 pounds. What is the best estimate of the mean amount spent by all 900 shoppers?
- 9th August 2013Find the median of 8, 3, 15, 3, 10.
- 10th August 2013A 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.
- 11th August 2013A scientist tests a new plant food but only uses it on the healthiest-looking plants. Explain why this is a flawed design.
- 12th August 2013The frequencies for four class intervals are 6, 9, 11, 4. Find the total number of data values.
- 13th August 2013In a pie chart representing 120 people, 30 people chose 'Yes'. What angle represents 'Yes'?
- 14th August 2013A Venn diagram shows 40 people: 22 own a car, 15 own a bike, 6 own both. Find the probability a random person owns neither.
- 15th August 2013A scatter graph shows points scattered with no clear pattern. What type of correlation does this show?
- 16th August 2013A 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.
- 17th August 2013Two data sets give correlation coefficients rs = 0.6 and rs = -0.9. Which shows the stronger relationship?
- 18th August 2013What is a pilot survey?
- 19th August 2013Is 'height of a plant in cm' discrete or continuous data?
- 20th August 2013Three groups have 8 items with mean 10, 12 items with mean 15, and 5 items with mean 20. Find the combined mean.
- 21st August 2013Using the survey in the previous question (Red 6, Blue 9, Green 4, Yellow 5), which colour is the mode?
- 22nd August 2013A 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?
- 23rd August 2013A 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.
- 24th August 2013A frequency table has class frequencies 5, 9, 14, 7 for four consecutive classes. Find the cumulative frequency of the third class.
- 25th August 2013A 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?
- 26th August 2013In 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?
- 27th August 2013Data 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.
- 28th August 2013Which stage of the statistical enquiry cycle comes immediately after collecting the data?
- 29th August 2013A student uses figures from a government website for her project. Is this primary or secondary data?
- 30th August 2013Find the median of: 3, 5, 8, 10.
- 31st August 2013Two 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.