Daily Practice · Foundation
May 2012 5-a-day
Printing for a group?
The batch download puts all 2 tiers' May 2012 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in May 2012
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st May 2012Events A and B are mutually exclusive with P(A) = 0.3 and P(B) = 0.25. Find P(A or B).
- 2nd May 2012Explain why estimating a y-value for x = 50 would be unreliable if all the plotted data only covers x-values from 0 to 20.
- 3rd May 2012Two variables have a correlation coefficient close to 0. What does this suggest?
- 4th May 2012The Spearman's rank correlation coefficient between temperature and ice cream sales for 8 days is rs = 0.95. Describe the correlation.
- 5th May 2012A pilot survey shows that many respondents left a question blank. What might this suggest about the question?
- 6th May 2012A researcher records the exact temperature of 30 cups of tea to the nearest 0.1 degrees C. State the type of data, giving two features.
- 7th May 2012Group A has 4 items with mean 12. Group B has 4 items with mean 20. Find the combined mean.
- 8th May 2012The number of pets owned by 15 households, recorded as collected, is: 0,1,2,1,0,3,1,2,0,1,1,2,0,1,2. Complete a frequency table for the number of pets and state the total frequency.
- 9th May 2012A bar chart shows 3 bars: Dogs 12, Cats 9, Rabbits 5. How many pets are shown in total?
- 10th May 2012Using the same diagram (0|5 8, 1|2 2 6, 2|1), what is the range?
- 11th May 2012A cumulative frequency graph shows that a cumulative frequency of 45 corresponds to a value of 60 on the horizontal axis, out of 90 total data values. How many data values are above 60?
- 12th May 2012What is the purpose of the key on a choropleth map?
- 13th May 2012A data set of 50 exam scores has the 20th percentile at 42 marks and the 80th percentile at 78 marks. Explain what these two values tell you about the middle 60% of scores.
- 14th May 2012Which spreadsheet formula would you use to find the total of the values in cells B2 to B20?
- 15th May 2012A supermarket wants to know if a new till layout reduces queuing time. Write a suitable statistical question for the start of the enquiry cycle.
- 16th May 2012Give one disadvantage of an observation study.
- 17th May 2012Two classes have the same median test score. Class A has IQR = 6 and Class B has IQR = 15. Which class's scores are more consistent, and why?
- 18th May 2012A pictogram has a key of 1 symbol = 4 people. A town has 22 people who play chess. How many symbols, including any part-symbol, should be drawn?
- 19th May 2012Using two fair six-sided dice added together, how many ways can you score a total of 7?
- 20th May 2012Find the midpoint of the class interval 10-20.
- 21st May 2012A company's yearly profits are 10, 12, 11, 15, 14 thousand pounds over five years. Describe the general trend.
- 22nd May 2012Out of 200 people who ate a certain meal, 10 became ill. What is the risk of becoming ill, as a fraction in its simplest form?
- 23rd May 2012A class has 12 boys and 8 girls. One student, a girl, leaves the room. A second student is then chosen at random from those remaining. Find P(second student chosen is a girl given the first was a girl).
- 24th May 2012A newspaper bar chart showing company profit over 5 years has no vertical axis labels or scale, just bars of different heights. Explain the problem with this.
- 25th May 2012Find the midpoint of the class interval 30-50.
- 26th May 2012What is wrong with the question 'Do you not think school lunches are too expensive?'
- 27th May 2012Find the 3-point moving average of 14, 18, 20.
- 28th May 2012A card is drawn at random from a normal 52-card pack. Find P(drawing a King or a Queen).
- 29th May 2012A histogram for exam scores has bars of equal width 10 marks, covering 0-10, 10-20, 20-30, 30-40, with heights 2, 8, 15, 5. How many students took the exam?
- 30th May 2012Name the five values needed to draw a box plot.
- 31st May 2012Give one reason you might choose to keep an outlier in a data set rather than remove it.