Statistics Exam Yr10

Question 1

When carrying out a survey, what are the 4 steps you must follow?

Answer 1

1. Ask a Question
2. Collect Data
3. Analyse date
4. Use results to answer question

Question 2

What does mode mean?

Answer 2

Mode is the value with the highest frequency/value that appears the most

Question 3

What is the mean?

Answer 3

The Mean is the sum of all values divided by the number of values.

Question 4

What is the Median?

Answer 4

The Median is the middle number/average of the two middle numbers when arranged in ascending order.

Question 5

What is the modal class?

Answer 5

It is the class with the highest frequency

Question 6

How do you figure out the range?

Answer 6

Range = largest value - smallest value

Question 7

What is the 5 number summary?

Answer 7

Lowest Value - 0% 
Lower Quartile - 25%
Median - 50%
Upper Quartile - 75%
Maximum - 100%

Question 8

How do you find the interquartile range?

Answer 8

Upper Quartile [Q3] - Lower Quartile [Q1]

Question 9

What are some of the features to look for in statistical displays?

Answer 9

• Outliers
• Clusters
• Symmetry v No Symmetry
• Left or right skew
• Uniformity
• Modes

Question 10

What are the different ways to describe correlation?

Answer 10

• Strong/moderate/weak correlation
• Positive/negative correlation
• No correlation/liner/non-linera correlation

Question 11

What is the PPDAC model consist of?

Answer 11

1. Problem
2. Plan
3. Data
4. Analysis
5. Conclusion

Question 12

What is the difference between population and samples?

Answer 12

A population is a certain collection of individuals/items. A sample is a subsection of a population.