Daily Practice · Foundation
July 2018 5-a-day
Printing for a group?
The batch download puts all 2 tiers' July 2018 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in July 2018
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 2018State one advantage of random sampling.
- 2nd July 2018What is meant by a control variable?
- 3rd July 2018Values 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.
- 4th July 2018A pie chart shows four categories with angles 90, 120, 60 and x degrees. Find x.
- 5th July 2018Events A and B are mutually exclusive with P(A) = 0.3 and P(B) = 0.25. Find P(A or B).
- 6th July 2018Explain why estimating a y-value for x = 50 would be unreliable if all the plotted data only covers x-values from 0 to 20.
- 7th July 2018Two variables have a correlation coefficient close to 0. What does this suggest?
- 8th July 2018The Spearman's rank correlation coefficient between temperature and ice cream sales for 8 days is rs = 0.95. Describe the correlation.
- 9th July 2018A pilot survey shows that many respondents left a question blank. What might this suggest about the question?
- 10th July 2018A 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.
- 11th July 2018Group A has 4 items with mean 12. Group B has 4 items with mean 20. Find the combined mean.
- 12th July 2018The 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.
- 13th July 2018A bar chart shows 3 bars: Dogs 12, Cats 9, Rabbits 5. How many pets are shown in total?
- 14th July 2018Using the same diagram (0|5 8, 1|2 2 6, 2|1), what is the range?
- 15th July 2018A 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?
- 16th July 2018What is the purpose of the key on a choropleth map?
- 17th July 2018A 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.
- 18th July 2018Which spreadsheet formula would you use to find the total of the values in cells B2 to B20?
- 19th July 2018A supermarket wants to know if a new till layout reduces queuing time. Write a suitable statistical question for the start of the enquiry cycle.
- 20th July 2018Give one disadvantage of an observation study.
- 21st July 2018Two 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?
- 22nd July 2018A 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?
- 23rd July 2018Using two fair six-sided dice added together, how many ways can you score a total of 7?
- 24th July 2018Find the midpoint of the class interval 10-20.
- 25th July 2018A company's yearly profits are 10, 12, 11, 15, 14 thousand pounds over five years. Describe the general trend.
- 26th July 2018Out 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?
- 27th July 2018A 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).
- 28th July 2018A 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.
- 29th July 2018Find the midpoint of the class interval 30-50.
- 30th July 2018What is wrong with the question 'Do you not think school lunches are too expensive?'
- 31st July 2018Find the 3-point moving average of 14, 18, 20.