Daily Practice · Foundation
December 2002 5-a-day
Printing for a group?
The batch download puts all 2 tiers' December 2002 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in December 2002
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 2002Country A's pyramid has a wide base and narrow top; Country B's has a narrow base and a wide middle/top. Which country most likely has the higher birth rate?
- 2nd December 2002A shop's till receipts have mode 5 pounds, median 8 pounds, mean 15 pounds. State the type of skew and give a reason.
- 3rd December 2002A random sample of 50 packets of crisps from a production run of 8000 found 3 were underweight. Estimate how many packets in the whole run are underweight.
- 4th December 2002Find the range of 22, 9, 31, 14, 6, 27.
- 5th December 2002A gym has 900 members. A sample of 45 is needed using systematic sampling, with a random start of 12. Find the 4th person selected.
- 6th December 2002In 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?
- 7th December 2002Using the data in the previous question (12, 18, 25, 31, 9, 22, 15), state the frequency of the interval 20 <= x < 30.
- 8th December 2002A sector has an angle of 72 degrees in a pie chart representing 50 people in total. How many people does this sector represent?
- 9th December 2002In a Venn diagram, what does the region where two circles overlap represent?
- 10th December 2002A scatter graph shows points that generally fall from top left to bottom right. What type of correlation does this show?
- 11th December 2002A study finds a positive correlation between shoe size and reading ability in primary school children. Does having big feet cause better reading?
- 12th December 2002A 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.
- 13th December 2002A tick-box question has the options '0-10', '10-20', '20-30'. What problem would a pilot survey likely identify with this?
- 14th December 2002Is 'number of pets owned' discrete or continuous data?
- 15th December 2002Group A has 6 items with mean 15. Group B has 9 items with mean 25. Find the combined mean.
- 16th December 2002A 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.
- 17th December 2002Two 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?
- 18th December 2002A 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?
- 19th December 2002Explain why a value read from a cumulative frequency graph, such as the median, is described as an estimate rather than an exact value.
- 20th December 2002On a choropleth map shaded from white (lowest) to black (highest), a region is coloured mid-grey. What does this suggest about its value?
- 21st December 2002A 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.
- 22nd December 2002A column of 8 test scores is in cells D2 to D9. Give the formula for the mean score.
- 23rd December 2002Name the first stage of the statistical enquiry cycle.
- 24th December 2002State one advantage secondary data has over primary data for a project on rainfall over the last 50 years.
- 25th December 2002A data set has Q1 = 22 and Q3 = 35. State the interquartile range and explain what it measures.
- 26th December 2002A pictogram key shows 1 symbol = 4 books. A row has 2 and a half symbols. How many books does the row represent?
- 27th December 2002Two fair coins are flipped. How many equally likely outcomes are in the sample space?
- 28th December 2002A frequency table has classes 0-10, 10-20, 20-30 with frequencies 3, 9, 6. State all three coordinates for the frequency polygon.
- 29th December 2002On a time series graph, what is always plotted on the horizontal axis?
- 30th December 2002Group 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.
- 31st December 2002A 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).