Daily Practice · Foundation
April 2009 5-a-day
Printing for a group?
The batch download puts all 2 tiers' April 2009 sheets in a single PDF, each tier behind its own divider page - 60 sheets in one file.
Every sheet in April 2009
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 2009Two variables have a correlation coefficient close to 0. What does this suggest?
- 2nd April 2009The Spearman's rank correlation coefficient between temperature and ice cream sales for 8 days is rs = 0.95. Describe the correlation.
- 3rd April 2009A pilot survey shows that many respondents left a question blank. What might this suggest about the question?
- 4th April 2009A 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.
- 5th April 2009Group A has 4 items with mean 12. Group B has 4 items with mean 20. Find the combined mean.
- 6th April 2009The 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.
- 7th April 2009A bar chart shows 3 bars: Dogs 12, Cats 9, Rabbits 5. How many pets are shown in total?
- 8th April 2009Using the same diagram (0|5 8, 1|2 2 6, 2|1), what is the range?
- 9th April 2009A 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?
- 10th April 2009What is the purpose of the key on a choropleth map?
- 11th April 2009A 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.
- 12th April 2009Which spreadsheet formula would you use to find the total of the values in cells B2 to B20?
- 13th April 2009A supermarket wants to know if a new till layout reduces queuing time. Write a suitable statistical question for the start of the enquiry cycle.
- 14th April 2009Give one disadvantage of an observation study.
- 15th April 2009Two 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?
- 16th April 2009A 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?
- 17th April 2009Using two fair six-sided dice added together, how many ways can you score a total of 7?
- 18th April 2009Find the midpoint of the class interval 10-20.
- 19th April 2009A company's yearly profits are 10, 12, 11, 15, 14 thousand pounds over five years. Describe the general trend.
- 20th April 2009Out 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?
- 21st April 2009A 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).
- 22nd April 2009A 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.
- 23rd April 2009Find the midpoint of the class interval 30-50.
- 24th April 2009What is wrong with the question 'Do you not think school lunches are too expensive?'
- 25th April 2009Find the 3-point moving average of 14, 18, 20.
- 26th April 2009A card is drawn at random from a normal 52-card pack. Find P(drawing a King or a Queen).
- 27th April 2009A 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?
- 28th April 2009Name the five values needed to draw a box plot.
- 29th April 2009Give one reason you might choose to keep an outlier in a data set rather than remove it.
- 30th April 2009A region records 90 crimes in a population of 45,000. Find the crude crime rate per 1000 people.