Daily Practice · Foundation
February 2005 5-a-day
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The batch download puts all 2 tiers' February 2005 sheets in a single PDF, each tier behind its own divider page - 56 sheets in one file.
Every sheet in February 2005
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 2005Using the same table (0:4, 1:10, 2:4, 3:2), find the total number of students.
- 2nd February 2005Two classes sit the same test. Class P: mean 70, range 10. Class Q: mean 55, range 30. Write a full comparison.
- 3rd February 2005An item has an index number of 88 compared to its base year. State whether the value has increased or decreased, and by what percentage.
- 4th February 2005An event has a probability of 0.2 of happening. What is the probability that it does not happen?
- 5th February 2005Using the relative frequency from the spinner above, estimate how many times it would land on blue in 300 spins.
- 6th February 2005A spinner has P(win) = 0.3. It is spun twice, independently. Find the probability of winning both times.
- 7th February 2005On a population pyramid, which axis shows the age groups?
- 8th February 2005A 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?
- 9th February 2005A 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?
- 10th February 2005Find the median of 8, 3, 15, 3, 10.
- 11th February 2005A 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.
- 12th February 2005A scientist tests a new plant food but only uses it on the healthiest-looking plants. Explain why this is a flawed design.
- 13th February 2005The frequencies for four class intervals are 6, 9, 11, 4. Find the total number of data values.
- 14th February 2005In a pie chart representing 120 people, 30 people chose 'Yes'. What angle represents 'Yes'?
- 15th February 2005A Venn diagram shows 40 people: 22 own a car, 15 own a bike, 6 own both. Find the probability a random person owns neither.
- 16th February 2005A scatter graph shows points scattered with no clear pattern. What type of correlation does this show?
- 17th February 2005A 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.
- 18th February 2005Two data sets give correlation coefficients rs = 0.6 and rs = -0.9. Which shows the stronger relationship?
- 19th February 2005What is a pilot survey?
- 20th February 2005Is 'height of a plant in cm' discrete or continuous data?
- 21st February 2005Three groups have 8 items with mean 10, 12 items with mean 15, and 5 items with mean 20. Find the combined mean.
- 22nd February 2005Using the survey in the previous question (Red 6, Blue 9, Green 4, Yellow 5), which colour is the mode?
- 23rd February 2005A 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?
- 24th February 2005A 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.
- 25th February 2005A frequency table has class frequencies 5, 9, 14, 7 for four consecutive classes. Find the cumulative frequency of the third class.
- 26th February 2005A 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?
- 27th February 2005In 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?
- 28th February 2005Data 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.