Daily Practice · Foundation
June 1998 5-a-day
Printing for a group?
The batch download puts all 2 tiers' June 1998 sheets in a single PDF, each tier behind its own divider page - 60 sheets in one file.
Every sheet in June 1998
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st June 1998A data set has mean 12, median 12, mode 12. Describe its skew.
- 2nd June 1998A sample of 80 light bulbs from a batch of 2000 found 4 were faulty. Estimate the number of faulty bulbs in the whole batch.
- 3rd June 1998The mean of 6 numbers is 15. Five of the numbers are 10, 12, 14, 18, 20. Find the sixth number.
- 4th June 1998State one advantage of random sampling.
- 5th June 1998What is meant by a control variable?
- 6th June 1998Values of 12, 18, 25, 31, 9, 22, 15 are grouped using intervals 0 <= x < 10, 10 <= x < 20, 20 <= x < 30, 30 <= x < 40. State the frequency of the interval 10 <= x < 20.
- 7th June 1998A pie chart shows four categories with angles 90, 120, 60 and x degrees. Find x.
- 8th June 1998Events A and B are mutually exclusive with P(A) = 0.3 and P(B) = 0.25. Find P(A or B).
- 9th June 1998Explain why estimating a y-value for x = 50 would be unreliable if all the plotted data only covers x-values from 0 to 20.
- 10th June 1998Two variables have a correlation coefficient close to 0. What does this suggest?
- 11th June 1998The Spearman's rank correlation coefficient between temperature and ice cream sales for 8 days is rs = 0.95. Describe the correlation.
- 12th June 1998A pilot survey shows that many respondents left a question blank. What might this suggest about the question?
- 13th June 1998A 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.
- 14th June 1998Group A has 4 items with mean 12. Group B has 4 items with mean 20. Find the combined mean.
- 15th June 1998The 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.
- 16th June 1998A bar chart shows 3 bars: Dogs 12, Cats 9, Rabbits 5. How many pets are shown in total?
- 17th June 1998Using the same diagram (0|5 8, 1|2 2 6, 2|1), what is the range?
- 18th June 1998A 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?
- 19th June 1998What is the purpose of the key on a choropleth map?
- 20th June 1998A 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.
- 21st June 1998Which spreadsheet formula would you use to find the total of the values in cells B2 to B20?
- 22nd June 1998A supermarket wants to know if a new till layout reduces queuing time. Write a suitable statistical question for the start of the enquiry cycle.
- 23rd June 1998Give one disadvantage of an observation study.
- 24th June 1998Two 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?
- 25th June 1998A 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?
- 26th June 1998Using two fair six-sided dice added together, how many ways can you score a total of 7?
- 27th June 1998Find the midpoint of the class interval 10-20.
- 28th June 1998A company's yearly profits are 10, 12, 11, 15, 14 thousand pounds over five years. Describe the general trend.
- 29th June 1998Out 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?
- 30th June 1998A 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).