Interpreting Results and Evaluating Findings

Miss Wardle says that males are nearly twice as likely to **not** complete homework compared to females. Show that the data in the table supports Miss Wardle's view.

Despite the support of the data, Miss Wardle might not be correct. Why not?

Jorja is investigating **only** the number of shoppers visiting the shop each month. Comment on the appropriateness, for her investigation, of the type of diagram she has drawn.

A choropleth map shows that nearly all of the countries with the lowest birth rate category (6-10 births per 1000) are in Europe. Given this, comment on whether the hypothesis you wrote in part (a) may be correct.

Here is the list of countries and their birth rates found by Sol. He decides to check the value for Honduras as he thinks it must be wrong. By referring to the map from the earlier question (which showed Central America in the 20.1-30 category), how does he know this value is almost certainly wrong?

Give **one** possible reason for the apparent huge differences between the birth rates for different countries.

Give **one** reason why the answer to part (f)(i) is an estimate.

A study finds a strong positive correlation between the number of ice creams sold and the number of shark attacks in a coastal town. Which of the following is the most sensible conclusion?

You will need to refer to the **Data Sheet** to answer this question. **Data Sheet - Table 1** Number of films released in the UK by certificate. | Certificate | 2008 | 2018 | |-------------|------|------| | U | 100 | 80 | | PG | 150 | 180 | | 12A | 120 | 200 | | 15 | 80 | 150 | | 18 | 50 | 40 | | **Total** | **500**| **650**| Look at **Table 1** in the Data Sheet. Discuss the trends in the number of films given each certificate from 2008 to 2018. Make **two** distinct comments on the trends.

**Data Sheet - Table 2** Percentage of films shown at a Northtown multiscreen cinema. | Certificate | Percentage | |-------------|------------| | U | 15% | | PG | 30% | | 12A | 40% | | 15 | 15% | | 18 | 0% | Look at **Table 2** on the Data Sheet. How do you know that the percentages are not exact?

Lopez concludes that no 18-certificate films were shown by the multiscreen cinema. Give **one** reason why Lopez might be correct.

Give **one** reason why Lopez might **not** be correct.

The table shows the number of males and females in the 20 to 29 age group living in Luton in 1961. | Number of males | Number of females | |-----------------|-------------------| | 9497 | 8967 | Make **two** distinct comments on how the numbers of males and females in the 20 to 29 age group are different in 1961 compared with in 1851.

What assumption did you have to make in answering part (a)(ii)?

Give a reason why the house may actually sell at this minimum price.

Between Jan 2010 and May 2018, the index for private sector pay rose from 100 to 118. The index for public sector pay rose from 100 to 112. Compare the changes in public sector and private sector pay between Jan 2010 and May 2018.

The table shows the annual sales value (£ million) in the UK of different ways to buy music. Write down the value of Downloads in 2015.

Make two comments about the trends shown on the graph.

A new adult Vizsla dog comes to the vet. The dog has a mass of 25 kg. Estimate the height of this dog.

Another adult dog comes to the vet. It has a mass of 19 kg and a height of 38 cm. Is it likely to be a Vizsla? Give a reason for your answer.

The graph shows information about the UK's most popular social media in 2019. Which was the second most popular messaging platform in the UK in 2019?

The population of the UK in 2019 was approximately 68 million. Simran said, "Nearly 55 million people used YouTube in the UK in 2019 and were on it every day.” Comment on this part of Simran's statement: "Nearly 55 million people used YouTube in the UK in 2019..."

Comment on this part of Simran's statement, "...and were on it every day.”

The pie chart shows information about how people voted in the Dartford area during the 2019 General Election. Which party had the most votes?

Caro has plotted this scatter diagram to show the numbers of umbrellas she sold against the amount of rain that fell each day. Caro can see from the scatter diagram that the greater the rainfall, the greater the number of umbrellas sold. Tess says that if Caro sells more umbrellas, there will be greater rainfall. Give a reason why Tess is not correct.

The weather forecast for tomorrow suggests that there will be 20 mm of rain throughout the day. Caro says she can use the scatter diagram to predict how many umbrellas she would sell if the rainfall was 20 mm. Is she correct? Give a reason for your answer.

Li Na says that the journey time between London and Manchester Piccadilly will be reduced by about an hour. Is Li Na correct? Show working to justify your answer.

This graph was seen on the BBC News App. Circle the letter of the statement for the graph which is **definitely** true.

Tom improves his questionnaire and collects his data. He finds that, - on average Year 7 have five hours of homework per week - on average Year 11 have eight hours of homework per week. Write a possible conclusion for Tom.

Tom wonders how this compares with other schools in the UK and schools in other countries. He finds this chart on the internet but it has no source. Use the chart to compare Tom's Year 11 results of an average of 8 hours homework per week with those for other schools in the UK and with other countries.

Why are Tom's data and the internet data not completely comparable?

Is Tom's data or the internet data more reliable? Give a reason for your answer.

Give two reasons why the picture might not be that helpful for someone to estimate their risk of lung cancer now.

Mitch decides to employ an extra person for a two-hour time period. Which time period would you suggest?

Has the company achieved each of its targets stated in part (b)? You must give a reason for each target. Target 1 - median number of rewards is increased Target 2 - interquartile range is increased

Write a possible conclusion to your hypothesis in part (a).

In a factory, three different machines, A, B and C, put crisps into bags. Filled bags are labelled as having a mass of 25g. Every two days, Luka, the quality control manager, obtains a sample of filled bags from each machine and calculates the sample mean. The control chart for 10 consecutive large samples for Machine A is shown below. What should Luka do, if anything, with Machine A, based on this chart?

The control chart for 10 consecutive large samples for Machine B is shown below. What should Luka do, if anything, with Machine B, based on this chart?

Ten large samples for Machine C show it to be working normally. Describe what a control chart for Machine C would look like.