Daily Practice · Foundation
December 2017 5-a-day
Printing for a group?
The batch download puts all 2 tiers' December 2017 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in December 2017
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 2017What value do you plot on the horizontal axis for each class of a frequency polygon?
- 2nd December 2017A time series of monthly temperatures shows one May with a temperature far below every other May on record. What might this value be called?
- 3rd December 2017In a trial, 3 out of 150 patients taking a new drug had side effects. Write this risk in '1 in n' form.
- 4th December 2017A 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).
- 5th December 2017A line graph's horizontal (time) axis has unequal gaps between the years labelled: 2010, 2011, 2015, 2016. Why could this mislead a reader?
- 6th December 2017The table shows weights, in kg, of 20 parcels: 0-5 (freq 4), 5-10 (freq 10), 10-15 (freq 6). Estimate the mean weight.
- 7th December 2017Rewrite the response options '0-5, 5-10, 10-15' so that they no longer overlap.
- 8th December 2017A series of 4-point moving averages is 45, 48, 52, 55. Describe the trend shown by these values.
- 9th December 2017A 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).
- 10th December 2017State one reason why a histogram has no gaps between its bars, unlike a bar chart.
- 11th December 2017Box 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?
- 12th December 2017A shop records daily sales in pounds: 340, 355, 360, 348, 2, 352. Which value looks like a data entry error?
- 13th December 2017A town of population 10,000 records 20 births in a year. Find the crude birth rate per 1000 people.
- 14th December 2017A 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.
- 15th December 2017Using the same table (0:4, 1:10, 2:4, 3:2), find the median number of siblings.
- 16th December 2017Data set X has a range of 12 and data set Y has a range of 5. Which data set is more consistent?
- 17th December 2017An index number is 140 with a base value of 20. Find this year's value.
- 18th December 2017A bag has 4 yellow and 6 white balls. What is P(picking a yellow ball)?
- 19th December 2017A dice is rolled 120 times and shows a 6 on 15 of those rolls. Find the relative frequency of rolling a 6.
- 20th December 2017A bag has 4 green and 6 yellow balls. One ball is drawn, replaced, then a second is drawn. Find P(both yellow).
- 21st December 2017A pyramid has a wide base and a narrow top. What does this suggest about the population?
- 22nd December 2017A distribution has a long tail of high values on the right. What type of skew is this?
- 23rd December 2017A 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.
- 24th December 2017Find the mode of 5, 6, 5, 8, 6, 6, 9.
- 25th December 2017State one disadvantage of quota sampling.
- 26th December 2017Give one reason why participants should be assigned to groups at random.
- 27th December 2017A class interval is written 10 <= x < 20. Which of these values belong in it: 10, 20, 15?
- 28th December 2017A pie chart represents 60 people. What angle represents 1 person?
- 29th December 2017A 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?
- 30th December 2017Using the line of best fit from the previous question, estimate the y-value when x = 6.
- 31st December 2017Define correlation in your own words.