Daily Practice · Foundation
March 2019 5-a-day
Printing for a group?
The batch download puts all 2 tiers' March 2019 sheets in a single PDF, each tier behind its own divider page - 62 sheets in one file.
Every sheet in March 2019
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 2019A tick-box question has the options '0-10', '10-20', '20-30'. What problem would a pilot survey likely identify with this?
- 2nd March 2019Is 'number of pets owned' discrete or continuous data?
- 3rd March 2019Group A has 6 items with mean 15. Group B has 9 items with mean 25. Find the combined mean.
- 4th March 2019A frequency table for test scores out of 10 shows: score 6 has frequency 5, score 7 has frequency 8, score 8 has frequency x, score 9 has frequency 3, and the total frequency is 25. Find x.
- 5th March 2019Two composite bars compare tea and coffee drinkers: Monday has a total of 60 drinks, of which 35 are tea; Tuesday has a total of 72 drinks, of which 40 are tea. On which day was a greater proportion of drinks tea?
- 6th March 2019A stem-and-leaf diagram has the row '1 | 4 7 9' with key '1|4 means 14'. What three data values does this row represent?
- 7th March 2019Explain why a value read from a cumulative frequency graph, such as the median, is described as an estimate rather than an exact value.
- 8th March 2019On a choropleth map shaded from white (lowest) to black (highest), a region is coloured mid-grey. What does this suggest about its value?
- 9th March 2019A cumulative frequency graph shows that a value of 18 corresponds to a cumulative frequency of 45 out of 60 total data points. Find the percentile.
- 10th March 2019A column of 8 test scores is in cells D2 to D9. Give the formula for the mean score.
- 11th March 2019Name the first stage of the statistical enquiry cycle.
- 12th March 2019State one advantage secondary data has over primary data for a project on rainfall over the last 50 years.
- 13th March 2019A data set has Q1 = 22 and Q3 = 35. State the interquartile range and explain what it measures.
- 14th March 2019A pictogram key shows 1 symbol = 4 books. A row has 2 and a half symbols. How many books does the row represent?
- 15th March 2019Two fair coins are flipped. How many equally likely outcomes are in the sample space?
- 16th March 2019A frequency table has classes 0-10, 10-20, 20-30 with frequencies 3, 9, 6. State all three coordinates for the frequency polygon.
- 17th March 2019On a time series graph, what is always plotted on the horizontal axis?
- 18th March 2019Group A has a risk of 0.08 of an event happening; Group B has a risk of 0.02. Find the relative risk of Group A compared with Group B.
- 19th March 2019A bag has 3 red, 4 green and 5 blue balls (12 total). One ball is removed at random and is blue. A second ball is then removed. Find P(second ball is red given the first ball was blue).
- 20th March 2019A 3D pie chart is used to show market share. Explain why 3D charts can be misleading.
- 21st March 2019A table has class intervals with frequency x midpoint totals of 45, 120, 90 and frequencies 5, 8, 6. Find the estimated mean.
- 22nd March 2019Explain why a pilot survey should be carried out before the full survey is sent out.
- 23rd March 2019Find the 4-point moving average of 12, 16, 20, 10.
- 24th March 2019P(rain) = 0.3 and P(snow) = 0.05 on a given day, and rain and snow are mutually exclusive that day. Find P(rain or snow).
- 25th March 2019Using the same histogram, how many students scored between 10 and 30 marks?
- 26th March 2019A box plot has lower quartile 10 and upper quartile 22. Find the interquartile range.
- 27th March 2019The heights (cm) of 6 plants are: 15, 18, 16, 14, 17, 150. Find the mean of the remaining values after removing the outlier.
- 28th March 2019Explain why a crude rate is more useful than a raw total, such as the total number of deaths, when comparing two towns of different sizes.
- 29th March 2019A factory has 400 workers: 160 in production, 120 in packing and 120 in admin. A stratified sample of 50 workers is needed. Find how many should be sampled from packing.
- 30th March 2019Using the same table (0:4, 1:10, 2:4, 3:2), find the mean number of siblings.
- 31st March 2019The mean rainfall in April was 45 mm with a range of 20 mm; in May it was 45 mm with a range of 8 mm. Compare April and May.