Daily Practice · Foundation
September 2015 5-a-day
Printing for a group?
The batch download puts all 2 tiers' September 2015 sheets in a single PDF, each tier behind its own divider page - 60 sheets in one file.
Every sheet in September 2015
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 2015State one disadvantage of quota sampling.
- 2nd September 2015Give one reason why participants should be assigned to groups at random.
- 3rd September 2015A class interval is written 10 <= x < 20. Which of these values belong in it: 10, 20, 15?
- 4th September 2015A pie chart represents 60 people. What angle represents 1 person?
- 5th September 2015A rectangle labelled 20 contains two non-overlapping circles for events A and B with 8 and 5 inside them. How many outcomes are outside both circles?
- 6th September 2015Using the line of best fit from the previous question, estimate the y-value when x = 6.
- 7th September 2015Define correlation in your own words.
- 8th September 2015The Spearman's rank correlation coefficient between the age of a used car and its price is rs = -0.88. Describe the correlation.
- 9th September 2015State one change a researcher might make to a questionnaire as a result of a pilot survey.
- 10th September 2015State whether 'shoe size' is discrete or continuous, and explain why.
- 11th September 2015Group A has 18 items with mean 62. Group B has 22 items with mean 70. Find the combined mean.
- 12th September 2015A tally shows 4 full groups of five plus 2 extra marks for one category. What is the frequency?
- 13th September 2015A composite bar chart shows exam grades at a school: the bar has a section from 0 to 10 for Grade 9-7, a section from 10 to 34 for Grade 6-4, and a section from 34 to 40 for Grade 3-1. How many students got Grade 6-4?
- 14th September 2015Using the diagram from the question above, what is the mode?
- 15th September 2015A cumulative frequency graph for 80 data values is used to estimate the median. At what cumulative frequency value do you read across to the curve?
- 16th September 2015A choropleth map uses class intervals of 0-10, 10-30, 30-40 and 40-90. Why might this be misleading?
- 17th September 2015What percentage of data lies below the 40th percentile?
- 18th September 2015Which spreadsheet formula would you use to find how many values are in the range C1 to C50?
- 19th September 2015A researcher decides her sample size was too small after seeing her results. Which stage of the cycle does this belong to?
- 20th September 2015A question asks: 'Don't you agree that the new bus timetable is an improvement?' State what is wrong with this question.
- 21st September 2015For the ordered data 2, 4, 5, 7, 8, 9, 11, 13, 14, find the lower quartile (Q1) and upper quartile (Q3).
- 22nd September 2015A pictogram shows 5 full symbols for apples sold, with a key of 1 symbol = 12 apples. How many apples were sold?
- 23rd September 2015Using the two-coin sample space, find P(exactly one head).
- 24th September 2015A frequency polygon has classes of unequal width: 0-10 and 10-30. Explain why comparing the heights of the two plotted points directly can be misleading.
- 25th September 2015Explain why using a time series trend to estimate a value many years into the future is less reliable than estimating one year ahead.
- 26th September 2015Using your answers to the previous question, find the relative risk for phone users compared with non-users, and interpret it.
- 27th September 2015A pack of 10 cards is numbered 1 to 10. One card is drawn and not replaced; it is even. A second card is then drawn. Find P(second card is even given the first card was even).
- 28th September 2015A pie chart is drawn showing 3 sectors that look visually equal in size, but the data is 50%, 30% and 20%. What is wrong?
- 29th September 2015A class interval 0-10 has frequency 6. Find frequency x midpoint.
- 30th September 2015What is wrong with the question 'How old are you and do you smoke?'