Daily Practice · Foundation
February 2012 5-a-day
Printing for a group?
The batch download puts all 2 tiers' February 2012 sheets in a single PDF, each tier behind its own divider page - 58 sheets in one file.
Every sheet in February 2012
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 2012What is a pilot survey?
- 2nd February 2012Is 'height of a plant in cm' discrete or continuous data?
- 3rd February 2012Three groups have 8 items with mean 10, 12 items with mean 15, and 5 items with mean 20. Find the combined mean.
- 4th February 2012Using the survey in the previous question (Red 6, Blue 9, Green 4, Yellow 5), which colour is the mode?
- 5th February 2012A 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?
- 6th February 2012A 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.
- 7th February 2012A frequency table has class frequencies 5, 9, 14, 7 for four consecutive classes. Find the cumulative frequency of the third class.
- 8th February 2012A 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?
- 9th February 2012In 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?
- 10th February 2012Data 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.
- 11th February 2012Which stage of the statistical enquiry cycle comes immediately after collecting the data?
- 12th February 2012A student uses figures from a government website for her project. Is this primary or secondary data?
- 13th February 2012Find the median of: 3, 5, 8, 10.
- 14th February 2012Two 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.
- 15th February 2012Using two fair six-sided dice added together, find P(total is 7).
- 16th February 2012Two 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?
- 17th February 2012A time series graph generally slopes upward from left to right over several years. What is this called?
- 18th February 2012Out 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.
- 19th February 2012In a survey of 40 students, 25 like Maths. Of those 25, 18 also like Science. Find P(likes Science given likes Maths).
- 20th February 2012A bar chart's vertical axis runs from 0 to 10 in equal steps of 2. Is this axis likely to be misleading?
- 21st February 2012The 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.
- 22nd February 2012Give one reason why the response options '0-5, 5-10, 10-15' are a poor choice for hours of homework.
- 23rd February 2012Find the 4-point moving average of 8, 12, 16, 20.
- 24th February 2012Are 'rolling an even number' and 'rolling a 5' on a normal six-sided dice mutually exclusive?
- 25th February 2012A 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.
- 26th February 2012Box 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?
- 27th February 2012A data set of test scores out of 100 is: 55, 60, 58, 62, 59, -10. Which value must be an error, and why?
- 28th February 2012A country of population 2,000,000 records 3,000 deaths in a year. Find the crude death rate per 100,000 people.
- 29th February 2012A college has 120 Maths students, 80 Science students and 100 English students (300 total). A stratified sample of size 60 is needed. Find the number sampled from each subject.