Daily Practice · Foundation
July 2012 5-a-day
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The batch download puts all 2 tiers' July 2012 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in July 2012
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 2012A researcher draws a bar chart from her results. Which stage of the cycle is this?
- 2nd July 2012Give one advantage of using a questionnaire to collect data.
- 3rd July 2012Find the median of: 4, 7, 9, 12, 15.
- 4th July 2012A pictogram key shows 1 symbol = 10 pupils. A row has 3 full symbols. How many pupils does the row represent?
- 5th July 2012Two fair six-sided dice are rolled and the scores are multiplied together. How many cells are in the sample space diagram?
- 6th July 2012What value do you plot on the horizontal axis for each class of a frequency polygon?
- 7th July 2012A time series of monthly temperatures shows one May with a temperature far below every other May on record. What might this value be called?
- 8th July 2012In a trial, 3 out of 150 patients taking a new drug had side effects. Write this risk in '1 in n' form.
- 9th July 2012A drawer has 7 black socks and 5 white socks. Two socks are taken without replacement. Find P(second sock is black given the first sock was black).
- 10th July 2012A line graph's horizontal (time) axis has unequal gaps between the years labelled: 2010, 2011, 2015, 2016. Why could this mislead a reader?
- 11th July 2012The table shows weights, in kg, of 20 parcels: 0-5 (freq 4), 5-10 (freq 10), 10-15 (freq 6). Estimate the mean weight.
- 12th July 2012Rewrite the response options '0-5, 5-10, 10-15' so that they no longer overlap.
- 13th July 2012A series of 4-point moving averages is 45, 48, 52, 55. Describe the trend shown by these values.
- 14th July 2012A 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).
- 15th July 2012State one reason why a histogram has no gaps between its bars, unlike a bar chart.
- 16th July 2012Box 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?
- 17th July 2012A shop records daily sales in pounds: 340, 355, 360, 348, 2, 352. Which value looks like a data entry error?
- 18th July 2012A town of population 10,000 records 20 births in a year. Find the crude birth rate per 1000 people.
- 19th July 2012A 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.
- 20th July 2012Using the same table (0:4, 1:10, 2:4, 3:2), find the median number of siblings.
- 21st July 2012Data set X has a range of 12 and data set Y has a range of 5. Which data set is more consistent?
- 22nd July 2012An index number is 140 with a base value of 20. Find this year's value.
- 23rd July 2012A bag has 4 yellow and 6 white balls. What is P(picking a yellow ball)?
- 24th July 2012A dice is rolled 120 times and shows a 6 on 15 of those rolls. Find the relative frequency of rolling a 6.
- 25th July 2012A bag has 4 green and 6 yellow balls. One ball is drawn, replaced, then a second is drawn. Find P(both yellow).
- 26th July 2012A pyramid has a wide base and a narrow top. What does this suggest about the population?
- 27th July 2012A distribution has a long tail of high values on the right. What type of skew is this?
- 28th July 2012A 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.
- 29th July 2012Find the mode of 5, 6, 5, 8, 6, 6, 9.
- 30th July 2012State one disadvantage of quota sampling.
- 31st July 2012Give one reason why participants should be assigned to groups at random.