Daily Practice · Foundation
March 2007 5-a-day
Printing for a group?
The batch download puts all 2 tiers' March 2007 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in March 2007
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 2007A pyramid has a wide base and a narrow top. What does this suggest about the population?
- 2nd March 2007A distribution has a long tail of high values on the right. What type of skew is this?
- 3rd March 2007A 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.
- 4th March 2007Find the mode of 5, 6, 5, 8, 6, 6, 9.
- 5th March 2007State one disadvantage of quota sampling.
- 6th March 2007Give one reason why participants should be assigned to groups at random.
- 7th March 2007A class interval is written 10 <= x < 20. Which of these values belong in it: 10, 20, 15?
- 8th March 2007A pie chart represents 60 people. What angle represents 1 person?
- 9th March 2007A 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?
- 10th March 2007Using the line of best fit from the previous question, estimate the y-value when x = 6.
- 11th March 2007Define correlation in your own words.
- 12th March 2007The Spearman's rank correlation coefficient between the age of a used car and its price is rs = -0.88. Describe the correlation.
- 13th March 2007State one change a researcher might make to a questionnaire as a result of a pilot survey.
- 14th March 2007State whether 'shoe size' is discrete or continuous, and explain why.
- 15th March 2007Group A has 18 items with mean 62. Group B has 22 items with mean 70. Find the combined mean.
- 16th March 2007A tally shows 4 full groups of five plus 2 extra marks for one category. What is the frequency?
- 17th March 2007A 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?
- 18th March 2007Using the diagram from the question above, what is the mode?
- 19th March 2007A 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?
- 20th March 2007A choropleth map uses class intervals of 0-10, 10-30, 30-40 and 40-90. Why might this be misleading?
- 21st March 2007What percentage of data lies below the 40th percentile?
- 22nd March 2007Which spreadsheet formula would you use to find how many values are in the range C1 to C50?
- 23rd March 2007A researcher decides her sample size was too small after seeing her results. Which stage of the cycle does this belong to?
- 24th March 2007A question asks: 'Don't you agree that the new bus timetable is an improvement?' State what is wrong with this question.
- 25th March 2007For the ordered data 2, 4, 5, 7, 8, 9, 11, 13, 14, find the lower quartile (Q1) and upper quartile (Q3).
- 26th March 2007A pictogram shows 5 full symbols for apples sold, with a key of 1 symbol = 12 apples. How many apples were sold?
- 27th March 2007Using the two-coin sample space, find P(exactly one head).
- 28th March 2007A 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.
- 29th March 2007Explain why using a time series trend to estimate a value many years into the future is less reliable than estimating one year ahead.
- 30th March 2007Using your answers to the previous question, find the relative risk for phone users compared with non-users, and interpret it.
- 31st March 2007A 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).