Daily Practice · Foundation
October 2003 5-a-day
Printing for a group?
The batch download puts all 2 tiers' October 2003 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in October 2003
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 2003Name the first stage of the statistical enquiry cycle.
- 2nd October 2003State one advantage secondary data has over primary data for a project on rainfall over the last 50 years.
- 3rd October 2003A data set has Q1 = 22 and Q3 = 35. State the interquartile range and explain what it measures.
- 4th October 2003A pictogram key shows 1 symbol = 4 books. A row has 2 and a half symbols. How many books does the row represent?
- 5th October 2003Two fair coins are flipped. How many equally likely outcomes are in the sample space?
- 6th October 2003A frequency table has classes 0-10, 10-20, 20-30 with frequencies 3, 9, 6. State all three coordinates for the frequency polygon.
- 7th October 2003On a time series graph, what is always plotted on the horizontal axis?
- 8th October 2003Group 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.
- 9th October 2003A 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).
- 10th October 2003A 3D pie chart is used to show market share. Explain why 3D charts can be misleading.
- 11th October 2003A table has class intervals with frequency x midpoint totals of 45, 120, 90 and frequencies 5, 8, 6. Find the estimated mean.
- 12th October 2003Explain why a pilot survey should be carried out before the full survey is sent out.
- 13th October 2003Find the 4-point moving average of 12, 16, 20, 10.
- 14th October 2003P(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).
- 15th October 2003Using the same histogram, how many students scored between 10 and 30 marks?
- 16th October 2003A box plot has lower quartile 10 and upper quartile 22. Find the interquartile range.
- 17th October 2003The heights (cm) of 6 plants are: 15, 18, 16, 14, 17, 150. Find the mean of the remaining values after removing the outlier.
- 18th October 2003Explain 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.
- 19th October 2003A 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.
- 20th October 2003Using the same table (0:4, 1:10, 2:4, 3:2), find the mean number of siblings.
- 21st October 2003The 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.
- 22nd October 2003A 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).
- 23rd October 2003The probability that a train is late is 0.15. Out of 200 trains, how many would you expect to be late?
- 24th October 2003The probability that a machine produces a faulty item is 0.04. Out of 300 items, how many would you expect to be faulty?
- 25th October 2003A box has 3 faulty bulbs out of 10. Two bulbs are chosen without replacement. Find the probability at least one is faulty.
- 26th October 2003In a pyramid, the bars for ages 65+ are unusually long compared with younger age bands. Give one possible reason.
- 27th October 2003A data set has mean 12, median 12, mode 12. Describe its skew.
- 28th October 2003A sample of 80 light bulbs from a batch of 2000 found 4 were faulty. Estimate the number of faulty bulbs in the whole batch.
- 29th October 2003The mean of 6 numbers is 15. Five of the numbers are 10, 12, 14, 18, 20. Find the sixth number.
- 30th October 2003State one advantage of random sampling.
- 31st October 2003What is meant by a control variable?