Daily Practice · Foundation
July 2000 5-a-day
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The batch download puts all 2 tiers' July 2000 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in July 2000
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 2000A 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.
- 2nd July 2000Two data sets give correlation coefficients rs = 0.6 and rs = -0.9. Which shows the stronger relationship?
- 3rd July 2000What is a pilot survey?
- 4th July 2000Is 'height of a plant in cm' discrete or continuous data?
- 5th July 2000Three groups have 8 items with mean 10, 12 items with mean 15, and 5 items with mean 20. Find the combined mean.
- 6th July 2000Using the survey in the previous question (Red 6, Blue 9, Green 4, Yellow 5), which colour is the mode?
- 7th July 2000A 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?
- 8th July 2000A 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.
- 9th July 2000A frequency table has class frequencies 5, 9, 14, 7 for four consecutive classes. Find the cumulative frequency of the third class.
- 10th July 2000A 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?
- 11th July 2000In 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?
- 12th July 2000Data 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.
- 13th July 2000Which stage of the statistical enquiry cycle comes immediately after collecting the data?
- 14th July 2000A student uses figures from a government website for her project. Is this primary or secondary data?
- 15th July 2000Find the median of: 3, 5, 8, 10.
- 16th July 2000Two 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.
- 17th July 2000Using two fair six-sided dice added together, find P(total is 7).
- 18th July 2000Two frequency polygons are drawn on the same axes for boys' and girls' test scores. What feature of the graphs shows which group generally scored higher?
- 19th July 2000A time series graph generally slopes upward from left to right over several years. What is this called?
- 20th July 2000Out of 600 drivers who used a phone while driving, 24 had an accident that year, compared with 9 out of 900 drivers who did not use a phone. Calculate the risk of an accident for each group.
- 21st July 2000In a survey of 40 students, 25 like Maths. Of those 25, 18 also like Science. Find P(likes Science given likes Maths).
- 22nd July 2000A bar chart's vertical axis runs from 0 to 10 in equal steps of 2. Is this axis likely to be misleading?
- 23rd July 2000The table shows ages, in years, of 50 people at a gym: 10-20 (freq 6), 20-30 (freq 18), 30-40 (freq 16), 40-50 (freq 10). Estimate the mean age.
- 24th July 2000Give one reason why the response options '0-5, 5-10, 10-15' are a poor choice for hours of homework.
- 25th July 2000Find the 4-point moving average of 8, 12, 16, 20.
- 26th July 2000Are 'rolling an even number' and 'rolling a 5' on a normal six-sided dice mutually exclusive?
- 27th July 2000A histogram of ages has 5 equal-width bars covering 0-10, 10-20, 20-30, 30-40, 40-50 with heights 3, 7, x, 9, 2, and a total of 35 people. Find x.
- 28th July 2000Box plot A has an interquartile range of 8 and box plot B has an interquartile range of 15. What does this tell you about the spread of the middle 50 percent of each data set?
- 29th July 2000A data set of test scores out of 100 is: 55, 60, 58, 62, 59, -10. Which value must be an error, and why?
- 30th July 2000A country of population 2,000,000 records 3,000 deaths in a year. Find the crude death rate per 100,000 people.
- 31st July 2000A college has 120 Maths students, 80 Science students and 100 English students (300 total). A stratified sample of size 60 is needed. Find the number sampled from each subject.