Daily Practice · Foundation
October 2009 5-a-day
Printing for a group?
The batch download puts all 2 tiers' October 2009 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in October 2009
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 2009A scientist tests a new plant food but only uses it on the healthiest-looking plants. Explain why this is a flawed design.
- 2nd October 2009The frequencies for four class intervals are 6, 9, 11, 4. Find the total number of data values.
- 3rd October 2009In a pie chart representing 120 people, 30 people chose 'Yes'. What angle represents 'Yes'?
- 4th October 2009A Venn diagram shows 40 people: 22 own a car, 15 own a bike, 6 own both. Find the probability a random person owns neither.
- 5th October 2009A scatter graph shows points scattered with no clear pattern. What type of correlation does this show?
- 6th October 2009A 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.
- 7th October 2009Two data sets give correlation coefficients rs = 0.6 and rs = -0.9. Which shows the stronger relationship?
- 8th October 2009What is a pilot survey?
- 9th October 2009Is 'height of a plant in cm' discrete or continuous data?
- 10th October 2009Three groups have 8 items with mean 10, 12 items with mean 15, and 5 items with mean 20. Find the combined mean.
- 11th October 2009Using the survey in the previous question (Red 6, Blue 9, Green 4, Yellow 5), which colour is the mode?
- 12th October 2009A 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?
- 13th October 2009A 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.
- 14th October 2009A frequency table has class frequencies 5, 9, 14, 7 for four consecutive classes. Find the cumulative frequency of the third class.
- 15th October 2009A 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?
- 16th October 2009In 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?
- 17th October 2009Data 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.
- 18th October 2009Which stage of the statistical enquiry cycle comes immediately after collecting the data?
- 19th October 2009A student uses figures from a government website for her project. Is this primary or secondary data?
- 20th October 2009Find the median of: 3, 5, 8, 10.
- 21st October 2009Two 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.
- 22nd October 2009Using two fair six-sided dice added together, find P(total is 7).
- 23rd October 2009Two 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?
- 24th October 2009A time series graph generally slopes upward from left to right over several years. What is this called?
- 25th October 2009Out 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.
- 26th October 2009In a survey of 40 students, 25 like Maths. Of those 25, 18 also like Science. Find P(likes Science given likes Maths).
- 27th October 2009A bar chart's vertical axis runs from 0 to 10 in equal steps of 2. Is this axis likely to be misleading?
- 28th October 2009The 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.
- 29th October 2009Give one reason why the response options '0-5, 5-10, 10-15' are a poor choice for hours of homework.
- 30th October 2009Find the 4-point moving average of 8, 12, 16, 20.
- 31st October 2009Are 'rolling an even number' and 'rolling a 5' on a normal six-sided dice mutually exclusive?