Daily Practice · Foundation
October 2001 5-a-day
Printing for a group?
The batch download puts all 2 tiers' October 2001 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in October 2001
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 2001A bag has 4 yellow and 6 white balls. What is P(picking a yellow ball)?
- 2nd October 2001A dice is rolled 120 times and shows a 6 on 15 of those rolls. Find the relative frequency of rolling a 6.
- 3rd October 2001A bag has 4 green and 6 yellow balls. One ball is drawn, replaced, then a second is drawn. Find P(both yellow).
- 4th October 2001A pyramid has a wide base and a narrow top. What does this suggest about the population?
- 5th October 2001A distribution has a long tail of high values on the right. What type of skew is this?
- 6th October 2001A 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.
- 7th October 2001Find the mode of 5, 6, 5, 8, 6, 6, 9.
- 8th October 2001State one disadvantage of quota sampling.
- 9th October 2001Give one reason why participants should be assigned to groups at random.
- 10th October 2001A class interval is written 10 <= x < 20. Which of these values belong in it: 10, 20, 15?
- 11th October 2001A pie chart represents 60 people. What angle represents 1 person?
- 12th October 2001A 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?
- 13th October 2001Using the line of best fit from the previous question, estimate the y-value when x = 6.
- 14th October 2001Define correlation in your own words.
- 15th October 2001The Spearman's rank correlation coefficient between the age of a used car and its price is rs = -0.88. Describe the correlation.
- 16th October 2001State one change a researcher might make to a questionnaire as a result of a pilot survey.
- 17th October 2001State whether 'shoe size' is discrete or continuous, and explain why.
- 18th October 2001Group A has 18 items with mean 62. Group B has 22 items with mean 70. Find the combined mean.
- 19th October 2001A tally shows 4 full groups of five plus 2 extra marks for one category. What is the frequency?
- 20th October 2001A 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?
- 21st October 2001Using the diagram from the question above, what is the mode?
- 22nd October 2001A 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?
- 23rd October 2001A choropleth map uses class intervals of 0-10, 10-30, 30-40 and 40-90. Why might this be misleading?
- 24th October 2001What percentage of data lies below the 40th percentile?
- 25th October 2001Which spreadsheet formula would you use to find how many values are in the range C1 to C50?
- 26th October 2001A researcher decides her sample size was too small after seeing her results. Which stage of the cycle does this belong to?
- 27th October 2001A question asks: 'Don't you agree that the new bus timetable is an improvement?' State what is wrong with this question.
- 28th October 2001For the ordered data 2, 4, 5, 7, 8, 9, 11, 13, 14, find the lower quartile (Q1) and upper quartile (Q3).
- 29th October 2001A pictogram shows 5 full symbols for apples sold, with a key of 1 symbol = 12 apples. How many apples were sold?
- 30th October 2001Using the two-coin sample space, find P(exactly one head).
- 31st October 2001A 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.