Daily Practice · Foundation
February 2020 5-a-day
Printing for a group?
The batch download puts all 2 tiers' February 2020 sheets in a single PDF, each tier behind its own divider page - 58 sheets in one file.
Every sheet in February 2020
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 2020A 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.
- 2nd February 2020Which spreadsheet formula would you use to find the total of the values in cells B2 to B20?
- 3rd February 2020A supermarket wants to know if a new till layout reduces queuing time. Write a suitable statistical question for the start of the enquiry cycle.
- 4th February 2020Give one disadvantage of an observation study.
- 5th February 2020Two 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?
- 6th February 2020A 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?
- 7th February 2020Using two fair six-sided dice added together, how many ways can you score a total of 7?
- 8th February 2020Find the midpoint of the class interval 10-20.
- 9th February 2020A company's yearly profits are 10, 12, 11, 15, 14 thousand pounds over five years. Describe the general trend.
- 10th February 2020Out 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?
- 11th February 2020A 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).
- 12th February 2020A 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.
- 13th February 2020Find the midpoint of the class interval 30-50.
- 14th February 2020What is wrong with the question 'Do you not think school lunches are too expensive?'
- 15th February 2020Find the 3-point moving average of 14, 18, 20.
- 16th February 2020A card is drawn at random from a normal 52-card pack. Find P(drawing a King or a Queen).
- 17th February 2020A 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?
- 18th February 2020Name the five values needed to draw a box plot.
- 19th February 2020Give one reason you might choose to keep an outlier in a data set rather than remove it.
- 20th February 2020A region records 90 crimes in a population of 45,000. Find the crude crime rate per 1000 people.
- 21st February 2020A youth club has 45 members under 13 and 75 members aged 13 to 17 (120 total). A stratified sample of 40 members is needed. How many aged 13 to 17 should be sampled?
- 22nd February 2020A different table shows test scores out of 5 for 30 students: 1 (freq 3), 2 (freq 5), 3 (freq 9), 4 (freq 8), 5 (freq 5). Find the mean score.
- 23rd February 2020Class A has a mean test score of 62 and Class B has a mean of 58. Which class did better on average?
- 24th February 2020A rent index shows 2019 = 100 and 2024 = 118. Find the actual rent in 2024 if the 2019 rent was 650 pounds.
- 25th February 2020A fair coin is flipped once. What is P(heads)?
- 26th February 2020Student A rolls a dice 20 times and gets a 6 four times. Student B rolls the same dice 300 times and gets a 6 forty-eight times. Whose relative frequency is a more reliable estimate of the true probability, and what is it?
- 27th February 2020A coin is flipped twice. Find the probability of getting two heads.
- 28th February 2020A pyramid is roughly the same width all the way up, with only a slightly narrower top. What does this suggest?
- 29th February 2020A distribution has mean = mode = median. What does this suggest about its shape?