Daily Practice · Foundation
January 2012 5-a-day
Printing for a group?
The batch download puts all 2 tiers' January 2012 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in January 2012
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 2012A time series shows sales peaking every December for five years in a row. What is this repeating pattern called?
- 2nd January 2012Express a risk of 1/20 as a percentage.
- 3rd January 2012A box has 4 chocolate and 6 plain biscuits. One biscuit is eaten (it was chocolate), then a second is taken at random. Find P(second is chocolate given first was chocolate).
- 4th January 2012A pictogram uses one whole apple symbol to represent 10 apples sold, but one row shows a half apple symbol with no key given for partial symbols. Why could this be misleading?
- 5th January 2012Find the midpoint of the class interval 10-20.
- 6th January 2012A survey question offers the response options 'Never, Sometimes, Always'. State one improvement that could be made.
- 7th January 2012Find the 3-point moving average of 10, 14, 18.
- 8th January 2012A bag has only red, blue and green counters. P(red) = 0.5 and P(blue) = 0.2. Find P(green).
- 9th January 2012A histogram has bars of equal width. True or false: the height of each bar represents the frequency for that class.
- 10th January 2012A box plot shows minimum 4 and maximum 36, with median 20. State the range of the data.
- 11th January 2012A data set of ages is: 12, 13, 12, 14, 13, 99. Which value is most likely an outlier?
- 12th January 2012A city's population grows from 50,000 to 52,000 in one year. Find the percentage rate of change.
- 13th January 2012A company has 60 male and 90 female employees (150 total). A stratified sample of 30 employees is taken. How many males should be sampled?
- 14th January 2012Using the same table (0:4, 1:10, 2:4, 3:2), find the total number of students.
- 15th January 2012Two classes sit the same test. Class P: mean 70, range 10. Class Q: mean 55, range 30. Write a full comparison.
- 16th January 2012An item has an index number of 88 compared to its base year. State whether the value has increased or decreased, and by what percentage.
- 17th January 2012An event has a probability of 0.2 of happening. What is the probability that it does not happen?
- 18th January 2012Using the relative frequency from the spinner above, estimate how many times it would land on blue in 300 spins.
- 19th January 2012A spinner has P(win) = 0.3. It is spun twice, independently. Find the probability of winning both times.
- 20th January 2012On a population pyramid, which axis shows the age groups?
- 21st January 2012A 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?
- 22nd January 2012A 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?
- 23rd January 2012Find the median of 8, 3, 15, 3, 10.
- 24th January 2012A 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.
- 25th January 2012A scientist tests a new plant food but only uses it on the healthiest-looking plants. Explain why this is a flawed design.
- 26th January 2012The frequencies for four class intervals are 6, 9, 11, 4. Find the total number of data values.
- 27th January 2012In a pie chart representing 120 people, 30 people chose 'Yes'. What angle represents 'Yes'?
- 28th January 2012A Venn diagram shows 40 people: 22 own a car, 15 own a bike, 6 own both. Find the probability a random person owns neither.
- 29th January 2012A scatter graph shows points scattered with no clear pattern. What type of correlation does this show?
- 30th January 2012A 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.
- 31st January 2012Two data sets give correlation coefficients rs = 0.6 and rs = -0.9. Which shows the stronger relationship?