Daily Practice · Foundation
September 2008 5-a-day
Printing for a group?
The batch download puts all 2 tiers' September 2008 sheets in a single PDF, each tier behind its own divider page - 60 sheets in one file.
Every sheet in September 2008
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 2008Rewrite the response options '0-5, 5-10, 10-15' so that they no longer overlap.
- 2nd September 2008A series of 4-point moving averages is 45, 48, 52, 55. Describe the trend shown by these values.
- 3rd September 2008A game has four mutually exclusive outcomes: win, draw, lose, abandoned. P(win) = 0.45, P(draw) = 0.2, P(abandoned) = 0.05. Find P(lose).
- 4th September 2008State one reason why a histogram has no gaps between its bars, unlike a bar chart.
- 5th September 2008Box plot A has a median of 50 and box plot B has a median of 42, for the same type of data. What does this tell you about the two data sets?
- 6th September 2008A shop records daily sales in pounds: 340, 355, 360, 348, 2, 352. Which value looks like a data entry error?
- 7th September 2008A town of population 10,000 records 20 births in a year. Find the crude birth rate per 1000 people.
- 8th September 2008A researcher wants a stratified sample of 30 from a population of 300 split into three regions: North (90 people), South (150 people) and East (60 people). She actually samples 9 from the North, 14 from the South and 7 from the East. Show whether her sample is correctly stratified, stating the correct numbers if not.
- 9th September 2008Using the same table (0:4, 1:10, 2:4, 3:2), find the median number of siblings.
- 10th September 2008Data set X has a range of 12 and data set Y has a range of 5. Which data set is more consistent?
- 11th September 2008An index number is 140 with a base value of 20. Find this year's value.
- 12th September 2008A bag has 4 yellow and 6 white balls. What is P(picking a yellow ball)?
- 13th September 2008A dice is rolled 120 times and shows a 6 on 15 of those rolls. Find the relative frequency of rolling a 6.
- 14th September 2008A bag has 4 green and 6 yellow balls. One ball is drawn, replaced, then a second is drawn. Find P(both yellow).
- 15th September 2008A pyramid has a wide base and a narrow top. What does this suggest about the population?
- 16th September 2008A distribution has a long tail of high values on the right. What type of skew is this?
- 17th September 2008A quality inspector samples 120 items from a batch of 15000 and finds 3 defective, but the sample was taken only from items made in the last hour of the day. Explain why her estimate might not be reliable, and give the estimate assuming the sample were representative.
- 18th September 2008Find the mode of 5, 6, 5, 8, 6, 6, 9.
- 19th September 2008State one disadvantage of quota sampling.
- 20th September 2008Give one reason why participants should be assigned to groups at random.
- 21st September 2008A class interval is written 10 <= x < 20. Which of these values belong in it: 10, 20, 15?
- 22nd September 2008A pie chart represents 60 people. What angle represents 1 person?
- 23rd September 2008A 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?
- 24th September 2008Using the line of best fit from the previous question, estimate the y-value when x = 6.
- 25th September 2008Define correlation in your own words.
- 26th September 2008The Spearman's rank correlation coefficient between the age of a used car and its price is rs = -0.88. Describe the correlation.
- 27th September 2008State one change a researcher might make to a questionnaire as a result of a pilot survey.
- 28th September 2008State whether 'shoe size' is discrete or continuous, and explain why.
- 29th September 2008Group A has 18 items with mean 62. Group B has 22 items with mean 70. Find the combined mean.
- 30th September 2008A tally shows 4 full groups of five plus 2 extra marks for one category. What is the frequency?