Daily Practice · Foundation
December 1998 5-a-day
Printing for a group?
The batch download puts all 2 tiers' December 1998 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in December 1998
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 1998An item has an index number of 88 compared to its base year. State whether the value has increased or decreased, and by what percentage.
- 2nd December 1998An event has a probability of 0.2 of happening. What is the probability that it does not happen?
- 3rd December 1998Using the relative frequency from the spinner above, estimate how many times it would land on blue in 300 spins.
- 4th December 1998A spinner has P(win) = 0.3. It is spun twice, independently. Find the probability of winning both times.
- 5th December 1998On a population pyramid, which axis shows the age groups?
- 6th December 1998A box plot shows a long whisker on the left and a short whisker on the right, with the median close to the right of the box. What type of skew does this suggest?
- 7th December 1998A survey of 30 shoppers out of 900 in a store found the mean amount spent was 18.50 pounds. What is the best estimate of the mean amount spent by all 900 shoppers?
- 8th December 1998Find the median of 8, 3, 15, 3, 10.
- 9th December 1998A school of 600 students wants a sample of 30. A teacher decides to only survey students in her own class of 30. State one problem with this method.
- 10th December 1998A scientist tests a new plant food but only uses it on the healthiest-looking plants. Explain why this is a flawed design.
- 11th December 1998The frequencies for four class intervals are 6, 9, 11, 4. Find the total number of data values.
- 12th December 1998In a pie chart representing 120 people, 30 people chose 'Yes'. What angle represents 'Yes'?
- 13th December 1998A Venn diagram shows 40 people: 22 own a car, 15 own a bike, 6 own both. Find the probability a random person owns neither.
- 14th December 1998A scatter graph shows points scattered with no clear pattern. What type of correlation does this show?
- 15th December 1998A researcher finds that towns with more fire engines have more fire damage, and concludes that fire engines cause fire damage. Identify the flaw in this reasoning and suggest the true common cause.
- 16th December 1998Two data sets give correlation coefficients rs = 0.6 and rs = -0.9. Which shows the stronger relationship?
- 17th December 1998What is a pilot survey?
- 18th December 1998Is 'height of a plant in cm' discrete or continuous data?
- 19th December 1998Three groups have 8 items with mean 10, 12 items with mean 15, and 5 items with mean 20. Find the combined mean.
- 20th December 1998Using the survey in the previous question (Red 6, Blue 9, Green 4, Yellow 5), which colour is the mode?
- 21st December 1998A bar chart uses a scale where each small square represents 2 people. A bar is 7 squares tall. How many people does the bar represent?
- 22nd December 1998A stem-and-leaf row, with key '3|1 means 31', is '3|0 2 4 4 7 9'. Find the median of these six values.
- 23rd December 1998A frequency table has class frequencies 5, 9, 14, 7 for four consecutive classes. Find the cumulative frequency of the third class.
- 24th December 1998A choropleth map of rainfall uses two different hues (for example yellow to red) rather than one hue getting darker. Why can this style of shading be a problem?
- 25th December 1998In a class of 30 students, a student's mark is at the 90th percentile. Roughly how many students scored less than or equal to that mark?
- 26th December 1998Data on 200 students' exam scores is in a spreadsheet. Give one advantage of using a spreadsheet rather than calculating the mean and range by hand.
- 27th December 1998Which stage of the statistical enquiry cycle comes immediately after collecting the data?
- 28th December 1998A student uses figures from a government website for her project. Is this primary or secondary data?
- 29th December 1998Find the median of: 3, 5, 8, 10.
- 30th December 1998Two rows of a pictogram show 4.5 symbols and 3.5 symbols, with a key of 1 symbol = 20 pounds. Work out the combined total for both rows.
- 31st December 1998Using two fair six-sided dice added together, find P(total is 7).