Daily Practice · Foundation
July 2010 5-a-day
Printing for a group?
The batch download puts all 2 tiers' July 2010 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in July 2010
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 2010An item has an index number of 88 compared to its base year. State whether the value has increased or decreased, and by what percentage.
- 2nd July 2010An event has a probability of 0.2 of happening. What is the probability that it does not happen?
- 3rd July 2010Using the relative frequency from the spinner above, estimate how many times it would land on blue in 300 spins.
- 4th July 2010A spinner has P(win) = 0.3. It is spun twice, independently. Find the probability of winning both times.
- 5th July 2010On a population pyramid, which axis shows the age groups?
- 6th July 2010A 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?
- 7th July 2010A 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?
- 8th July 2010Find the median of 8, 3, 15, 3, 10.
- 9th July 2010A 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.
- 10th July 2010A scientist tests a new plant food but only uses it on the healthiest-looking plants. Explain why this is a flawed design.
- 11th July 2010The frequencies for four class intervals are 6, 9, 11, 4. Find the total number of data values.
- 12th July 2010In a pie chart representing 120 people, 30 people chose 'Yes'. What angle represents 'Yes'?
- 13th July 2010A Venn diagram shows 40 people: 22 own a car, 15 own a bike, 6 own both. Find the probability a random person owns neither.
- 14th July 2010A scatter graph shows points scattered with no clear pattern. What type of correlation does this show?
- 15th July 2010A 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.
- 16th July 2010Two data sets give correlation coefficients rs = 0.6 and rs = -0.9. Which shows the stronger relationship?
- 17th July 2010What is a pilot survey?
- 18th July 2010Is 'height of a plant in cm' discrete or continuous data?
- 19th July 2010Three groups have 8 items with mean 10, 12 items with mean 15, and 5 items with mean 20. Find the combined mean.
- 20th July 2010Using the survey in the previous question (Red 6, Blue 9, Green 4, Yellow 5), which colour is the mode?
- 21st July 2010A 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?
- 22nd July 2010A 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.
- 23rd July 2010A frequency table has class frequencies 5, 9, 14, 7 for four consecutive classes. Find the cumulative frequency of the third class.
- 24th July 2010A 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?
- 25th July 2010In 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?
- 26th July 2010Data 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.
- 27th July 2010Which stage of the statistical enquiry cycle comes immediately after collecting the data?
- 28th July 2010A student uses figures from a government website for her project. Is this primary or secondary data?
- 29th July 2010Find the median of: 3, 5, 8, 10.
- 30th July 2010Two 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.
- 31st July 2010Using two fair six-sided dice added together, find P(total is 7).