Daily Practice · Foundation
March 2015 5-a-day
Printing for a group?
The batch download puts all 2 tiers' March 2015 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in March 2015
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 2015A Venn diagram shows 40 people: 22 own a car, 15 own a bike, 6 own both. Find the probability a random person owns neither.
- 2nd March 2015A scatter graph shows points scattered with no clear pattern. What type of correlation does this show?
- 3rd March 2015A 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.
- 4th March 2015Two data sets give correlation coefficients rs = 0.6 and rs = -0.9. Which shows the stronger relationship?
- 5th March 2015What is a pilot survey?
- 6th March 2015Is 'height of a plant in cm' discrete or continuous data?
- 7th March 2015Three groups have 8 items with mean 10, 12 items with mean 15, and 5 items with mean 20. Find the combined mean.
- 8th March 2015Using the survey in the previous question (Red 6, Blue 9, Green 4, Yellow 5), which colour is the mode?
- 9th March 2015A 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?
- 10th March 2015A 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.
- 11th March 2015A frequency table has class frequencies 5, 9, 14, 7 for four consecutive classes. Find the cumulative frequency of the third class.
- 12th March 2015A 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?
- 13th March 2015In 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?
- 14th March 2015Data 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.
- 15th March 2015Which stage of the statistical enquiry cycle comes immediately after collecting the data?
- 16th March 2015A student uses figures from a government website for her project. Is this primary or secondary data?
- 17th March 2015Find the median of: 3, 5, 8, 10.
- 18th March 2015Two 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.
- 19th March 2015Using two fair six-sided dice added together, find P(total is 7).
- 20th March 2015Two 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?
- 21st March 2015A time series graph generally slopes upward from left to right over several years. What is this called?
- 22nd March 2015Out 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.
- 23rd March 2015In a survey of 40 students, 25 like Maths. Of those 25, 18 also like Science. Find P(likes Science given likes Maths).
- 24th March 2015A bar chart's vertical axis runs from 0 to 10 in equal steps of 2. Is this axis likely to be misleading?
- 25th March 2015The 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.
- 26th March 2015Give one reason why the response options '0-5, 5-10, 10-15' are a poor choice for hours of homework.
- 27th March 2015Find the 4-point moving average of 8, 12, 16, 20.
- 28th March 2015Are 'rolling an even number' and 'rolling a 5' on a normal six-sided dice mutually exclusive?
- 29th March 2015A histogram of ages has 5 equal-width bars covering 0-10, 10-20, 20-30, 30-40, 40-50 with heights 3, 7, x, 9, 2, and a total of 35 people. Find x.
- 30th March 2015Box plot A has an interquartile range of 8 and box plot B has an interquartile range of 15. What does this tell you about the spread of the middle 50 percent of each data set?
- 31st March 2015A data set of test scores out of 100 is: 55, 60, 58, 62, 59, -10. Which value must be an error, and why?