Daily Practice · Foundation
May 2008 5-a-day
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The batch download puts all 2 tiers' May 2008 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in May 2008
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st May 2008A gym has 900 members. A sample of 45 is needed using systematic sampling, with a random start of 12. Find the 4th person selected.
- 2nd May 2008In a medicine trial, half the patients receive the real drug and half receive a dummy pill, and neither the patients nor the doctors know who received which until after results are recorded. What is this type of trial called, and why is it used?
- 3rd May 2008Using the data in the previous question (12, 18, 25, 31, 9, 22, 15), state the frequency of the interval 20 <= x < 30.
- 4th May 2008A sector has an angle of 72 degrees in a pie chart representing 50 people in total. How many people does this sector represent?
- 5th May 2008In a Venn diagram, what does the region where two circles overlap represent?
- 6th May 2008A scatter graph shows points that generally fall from top left to bottom right. What type of correlation does this show?
- 7th May 2008A study finds a positive correlation between shoe size and reading ability in primary school children. Does having big feet cause better reading?
- 8th May 2008A researcher finds rs = 0.99 between a town's number of ice cream vans and its number of sunburn cases, and concludes the vans cause sunburn. Explain why this conclusion may be wrong.
- 9th May 2008A tick-box question has the options '0-10', '10-20', '20-30'. What problem would a pilot survey likely identify with this?
- 10th May 2008Is 'number of pets owned' discrete or continuous data?
- 11th May 2008Group A has 6 items with mean 15. Group B has 9 items with mean 25. Find the combined mean.
- 12th May 2008A frequency table for test scores out of 10 shows: score 6 has frequency 5, score 7 has frequency 8, score 8 has frequency x, score 9 has frequency 3, and the total frequency is 25. Find x.
- 13th May 2008Two composite bars compare tea and coffee drinkers: Monday has a total of 60 drinks, of which 35 are tea; Tuesday has a total of 72 drinks, of which 40 are tea. On which day was a greater proportion of drinks tea?
- 14th May 2008A stem-and-leaf diagram has the row '1 | 4 7 9' with key '1|4 means 14'. What three data values does this row represent?
- 15th May 2008Explain why a value read from a cumulative frequency graph, such as the median, is described as an estimate rather than an exact value.
- 16th May 2008On a choropleth map shaded from white (lowest) to black (highest), a region is coloured mid-grey. What does this suggest about its value?
- 17th May 2008A cumulative frequency graph shows that a value of 18 corresponds to a cumulative frequency of 45 out of 60 total data points. Find the percentile.
- 18th May 2008A column of 8 test scores is in cells D2 to D9. Give the formula for the mean score.
- 19th May 2008Name the first stage of the statistical enquiry cycle.
- 20th May 2008State one advantage secondary data has over primary data for a project on rainfall over the last 50 years.
- 21st May 2008A data set has Q1 = 22 and Q3 = 35. State the interquartile range and explain what it measures.
- 22nd May 2008A pictogram key shows 1 symbol = 4 books. A row has 2 and a half symbols. How many books does the row represent?
- 23rd May 2008Two fair coins are flipped. How many equally likely outcomes are in the sample space?
- 24th May 2008A frequency table has classes 0-10, 10-20, 20-30 with frequencies 3, 9, 6. State all three coordinates for the frequency polygon.
- 25th May 2008On a time series graph, what is always plotted on the horizontal axis?
- 26th May 2008Group 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.
- 27th May 2008A 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).
- 28th May 2008A 3D pie chart is used to show market share. Explain why 3D charts can be misleading.
- 29th May 2008A table has class intervals with frequency x midpoint totals of 45, 120, 90 and frequencies 5, 8, 6. Find the estimated mean.
- 30th May 2008Explain why a pilot survey should be carried out before the full survey is sent out.
- 31st May 2008Find the 4-point moving average of 12, 16, 20, 10.