Daily Practice · Foundation
April 2012 5-a-day
Printing for a group?
The batch download puts all 2 tiers' April 2012 sheets in a single PDF, each tier behind its own divider page - 60 sheets in one file.
Every sheet in April 2012
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 2012A pictogram key shows 1 symbol = 4 books. A row has 2 and a half symbols. How many books does the row represent?
- 2nd April 2012Two fair coins are flipped. How many equally likely outcomes are in the sample space?
- 3rd April 2012A frequency table has classes 0-10, 10-20, 20-30 with frequencies 3, 9, 6. State all three coordinates for the frequency polygon.
- 4th April 2012On a time series graph, what is always plotted on the horizontal axis?
- 5th April 2012Group A has a risk of 0.08 of an event happening; Group B has a risk of 0.02. Find the relative risk of Group A compared with Group B.
- 6th April 2012A bag has 3 red, 4 green and 5 blue balls (12 total). One ball is removed at random and is blue. A second ball is then removed. Find P(second ball is red given the first ball was blue).
- 7th April 2012A 3D pie chart is used to show market share. Explain why 3D charts can be misleading.
- 8th April 2012A table has class intervals with frequency x midpoint totals of 45, 120, 90 and frequencies 5, 8, 6. Find the estimated mean.
- 9th April 2012Explain why a pilot survey should be carried out before the full survey is sent out.
- 10th April 2012Find the 4-point moving average of 12, 16, 20, 10.
- 11th April 2012P(rain) = 0.3 and P(snow) = 0.05 on a given day, and rain and snow are mutually exclusive that day. Find P(rain or snow).
- 12th April 2012Using the same histogram, how many students scored between 10 and 30 marks?
- 13th April 2012A box plot has lower quartile 10 and upper quartile 22. Find the interquartile range.
- 14th April 2012The heights (cm) of 6 plants are: 15, 18, 16, 14, 17, 150. Find the mean of the remaining values after removing the outlier.
- 15th April 2012Explain why a crude rate is more useful than a raw total, such as the total number of deaths, when comparing two towns of different sizes.
- 16th April 2012A factory has 400 workers: 160 in production, 120 in packing and 120 in admin. A stratified sample of 50 workers is needed. Find how many should be sampled from packing.
- 17th April 2012Using the same table (0:4, 1:10, 2:4, 3:2), find the mean number of siblings.
- 18th April 2012The mean rainfall in April was 45 mm with a range of 20 mm; in May it was 45 mm with a range of 8 mm. Compare April and May.
- 19th April 2012A cost index for electricity, relative to the same base year, was 120 in 2021 and 150 in 2023. Find the percentage increase in the cost of electricity from 2021 to 2023 (not from the base year).
- 20th April 2012The probability that a train is late is 0.15. Out of 200 trains, how many would you expect to be late?
- 21st April 2012The probability that a machine produces a faulty item is 0.04. Out of 300 items, how many would you expect to be faulty?
- 22nd April 2012A box has 3 faulty bulbs out of 10. Two bulbs are chosen without replacement. Find the probability at least one is faulty.
- 23rd April 2012In a pyramid, the bars for ages 65+ are unusually long compared with younger age bands. Give one possible reason.
- 24th April 2012A data set has mean 12, median 12, mode 12. Describe its skew.
- 25th April 2012A sample of 80 light bulbs from a batch of 2000 found 4 were faulty. Estimate the number of faulty bulbs in the whole batch.
- 26th April 2012The mean of 6 numbers is 15. Five of the numbers are 10, 12, 14, 18, 20. Find the sixth number.
- 27th April 2012State one advantage of random sampling.
- 28th April 2012What is meant by a control variable?
- 29th April 2012Values of 12, 18, 25, 31, 9, 22, 15 are grouped using intervals 0 <= x < 10, 10 <= x < 20, 20 <= x < 30, 30 <= x < 40. State the frequency of the interval 10 <= x < 20.
- 30th April 2012A pie chart shows four categories with angles 90, 120, 60 and x degrees. Find x.