Daily Practice · Foundation
October 2019 5-a-day
Printing for a group?
The batch download puts all 2 tiers' October 2019 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in October 2019
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 2019A data set of ages is: 12, 13, 12, 14, 13, 99. Which value is most likely an outlier?
- 2nd October 2019A city's population grows from 50,000 to 52,000 in one year. Find the percentage rate of change.
- 3rd October 2019A company has 60 male and 90 female employees (150 total). A stratified sample of 30 employees is taken. How many males should be sampled?
- 4th October 2019Using the same table (0:4, 1:10, 2:4, 3:2), find the total number of students.
- 5th October 2019Two classes sit the same test. Class P: mean 70, range 10. Class Q: mean 55, range 30. Write a full comparison.
- 6th October 2019An item has an index number of 88 compared to its base year. State whether the value has increased or decreased, and by what percentage.
- 7th October 2019An event has a probability of 0.2 of happening. What is the probability that it does not happen?
- 8th October 2019Using the relative frequency from the spinner above, estimate how many times it would land on blue in 300 spins.
- 9th October 2019A spinner has P(win) = 0.3. It is spun twice, independently. Find the probability of winning both times.
- 10th October 2019On a population pyramid, which axis shows the age groups?
- 11th October 2019A 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?
- 12th October 2019A 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?
- 13th October 2019Find the median of 8, 3, 15, 3, 10.
- 14th October 2019A 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.
- 15th October 2019A scientist tests a new plant food but only uses it on the healthiest-looking plants. Explain why this is a flawed design.
- 16th October 2019The frequencies for four class intervals are 6, 9, 11, 4. Find the total number of data values.
- 17th October 2019In a pie chart representing 120 people, 30 people chose 'Yes'. What angle represents 'Yes'?
- 18th October 2019A Venn diagram shows 40 people: 22 own a car, 15 own a bike, 6 own both. Find the probability a random person owns neither.
- 19th October 2019A scatter graph shows points scattered with no clear pattern. What type of correlation does this show?
- 20th October 2019A 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.
- 21st October 2019Two data sets give correlation coefficients rs = 0.6 and rs = -0.9. Which shows the stronger relationship?
- 22nd October 2019What is a pilot survey?
- 23rd October 2019Is 'height of a plant in cm' discrete or continuous data?
- 24th October 2019Three groups have 8 items with mean 10, 12 items with mean 15, and 5 items with mean 20. Find the combined mean.
- 25th October 2019Using the survey in the previous question (Red 6, Blue 9, Green 4, Yellow 5), which colour is the mode?
- 26th October 2019A 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?
- 27th October 2019A 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.
- 28th October 2019A frequency table has class frequencies 5, 9, 14, 7 for four consecutive classes. Find the cumulative frequency of the third class.
- 29th October 2019A 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?
- 30th October 2019In 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?
- 31st October 2019Data 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.