Daily Practice · Foundation
April 2005 5-a-day
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The batch download puts all 2 tiers' April 2005 sheets in a single PDF, each tier behind its own divider page - 60 sheets in one file.
Every sheet in April 2005
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 2005Using the data in the previous question (12, 18, 25, 31, 9, 22, 15), state the frequency of the interval 20 <= x < 30.
- 2nd April 2005A sector has an angle of 72 degrees in a pie chart representing 50 people in total. How many people does this sector represent?
- 3rd April 2005In a Venn diagram, what does the region where two circles overlap represent?
- 4th April 2005A scatter graph shows points that generally fall from top left to bottom right. What type of correlation does this show?
- 5th April 2005A study finds a positive correlation between shoe size and reading ability in primary school children. Does having big feet cause better reading?
- 6th April 2005A 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.
- 7th April 2005A tick-box question has the options '0-10', '10-20', '20-30'. What problem would a pilot survey likely identify with this?
- 8th April 2005Is 'number of pets owned' discrete or continuous data?
- 9th April 2005Group A has 6 items with mean 15. Group B has 9 items with mean 25. Find the combined mean.
- 10th April 2005A 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.
- 11th April 2005Two 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?
- 12th April 2005A 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?
- 13th April 2005Explain why a value read from a cumulative frequency graph, such as the median, is described as an estimate rather than an exact value.
- 14th April 2005On a choropleth map shaded from white (lowest) to black (highest), a region is coloured mid-grey. What does this suggest about its value?
- 15th April 2005A 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.
- 16th April 2005A column of 8 test scores is in cells D2 to D9. Give the formula for the mean score.
- 17th April 2005Name the first stage of the statistical enquiry cycle.
- 18th April 2005State one advantage secondary data has over primary data for a project on rainfall over the last 50 years.
- 19th April 2005A data set has Q1 = 22 and Q3 = 35. State the interquartile range and explain what it measures.
- 20th April 2005A pictogram key shows 1 symbol = 4 books. A row has 2 and a half symbols. How many books does the row represent?
- 21st April 2005Two fair coins are flipped. How many equally likely outcomes are in the sample space?
- 22nd April 2005A frequency table has classes 0-10, 10-20, 20-30 with frequencies 3, 9, 6. State all three coordinates for the frequency polygon.
- 23rd April 2005On a time series graph, what is always plotted on the horizontal axis?
- 24th April 2005Group 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.
- 25th April 2005A 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).
- 26th April 2005A 3D pie chart is used to show market share. Explain why 3D charts can be misleading.
- 27th April 2005A table has class intervals with frequency x midpoint totals of 45, 120, 90 and frequencies 5, 8, 6. Find the estimated mean.
- 28th April 2005Explain why a pilot survey should be carried out before the full survey is sent out.
- 29th April 2005Find the 4-point moving average of 12, 16, 20, 10.
- 30th April 2005P(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).