Daily Practice · Foundation
November 2021 5-a-day
Printing for a group?
The batch download puts all 2 tiers' November 2021 sheets in a single PDF, each tier behind its own divider page - 60 sheets in one file.
Every sheet in November 2021
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st November 2021A distribution has a long tail of high values on the right. What type of skew is this?
- 2nd November 2021A 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.
- 3rd November 2021Find the mode of 5, 6, 5, 8, 6, 6, 9.
- 4th November 2021State one disadvantage of quota sampling.
- 5th November 2021Give one reason why participants should be assigned to groups at random.
- 6th November 2021A class interval is written 10 <= x < 20. Which of these values belong in it: 10, 20, 15?
- 7th November 2021A pie chart represents 60 people. What angle represents 1 person?
- 8th November 2021A 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?
- 9th November 2021Using the line of best fit from the previous question, estimate the y-value when x = 6.
- 10th November 2021Define correlation in your own words.
- 11th November 2021The Spearman's rank correlation coefficient between the age of a used car and its price is rs = -0.88. Describe the correlation.
- 12th November 2021State one change a researcher might make to a questionnaire as a result of a pilot survey.
- 13th November 2021State whether 'shoe size' is discrete or continuous, and explain why.
- 14th November 2021Group A has 18 items with mean 62. Group B has 22 items with mean 70. Find the combined mean.
- 15th November 2021A tally shows 4 full groups of five plus 2 extra marks for one category. What is the frequency?
- 16th November 2021A 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?
- 17th November 2021Using the diagram from the question above, what is the mode?
- 18th November 2021A 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?
- 19th November 2021A choropleth map uses class intervals of 0-10, 10-30, 30-40 and 40-90. Why might this be misleading?
- 20th November 2021What percentage of data lies below the 40th percentile?
- 21st November 2021Which spreadsheet formula would you use to find how many values are in the range C1 to C50?
- 22nd November 2021A researcher decides her sample size was too small after seeing her results. Which stage of the cycle does this belong to?
- 23rd November 2021A question asks: 'Don't you agree that the new bus timetable is an improvement?' State what is wrong with this question.
- 24th November 2021For the ordered data 2, 4, 5, 7, 8, 9, 11, 13, 14, find the lower quartile (Q1) and upper quartile (Q3).
- 25th November 2021A pictogram shows 5 full symbols for apples sold, with a key of 1 symbol = 12 apples. How many apples were sold?
- 26th November 2021Using the two-coin sample space, find P(exactly one head).
- 27th November 2021A 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.
- 28th November 2021Explain why using a time series trend to estimate a value many years into the future is less reliable than estimating one year ahead.
- 29th November 2021Using your answers to the previous question, find the relative risk for phone users compared with non-users, and interpret it.
- 30th November 2021A 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).