Stats Quiz

What three things would you expect to find in an experimental design?

• number of replicates
• literature review
• The way the collected data is analysed.
• allocation of participants to treatment groups
• description of independent and dependant variables

With hypothesis testing, we must pre-select asignificance level (below which H₀will be rejected). Which of the below is the most commonly used significancelevel in the biological sciences?

• 0.1
• 0.5
• 0.05
• 0.01

What does calculating standard deviation provide a measure of?

• How much individual values deviate from the mean value of the dataset.

• Howmuch individual values deviate from the mode value of the dataset.
• Howmuch individual values deviate from the median value of the dataset.
• Estimates how repeated measures of a person on the same instrument tend to be distributed

The distribution shown on the graph above is:

• Skewed to the left
• Normal
• Skewed to the right
• Discrete

The range for the data set (10,14,4,6,22,20,18,8,12,16) is:

• 22
• 20
• 18
• 16

Which of the following are classed as a measure central tendency? Select all of the answers which you think are correct.

• Mean
• Median
• Mode
• Standard deviation
• Standard error of the mean

Which one of the following statements is incorrect? Select multiple

• A minimum of 30 observations are required to undertake a student T-Test.

• Student T-Tests require data which is normally distributed.

• Paired sample T-tests are only used when the two samples utilise the same subjects.

• A minimum of three treatment groups are required for a T-test

What is theappropriate test to assess equal variance, before conducting a T-Test?

• Sharpiro-WilkoTest
• Mann-Whitney U-Test
• F-Test
• Standard deviation

Which of the following two scenarios would require a paired T-Test?

• 14 fields growing wheat had their yields tested, 7 from Scotland and 7 from France looking at the influence of rainfall on production.

• 20 people were used to investigate the impact of a new protein supplement to positively impact stamina, 10 were given a placebo while 10 were given the new protein supplement.

• 6 horses were used to investigate the impact of rider weight on injuryrate, all 6 horses were ridden by riders under 60 kg and then ridden again byriders ridden over 95 kg.
• heart rate of 10 individuals was measured whilst resting. After a 10 minute cardio session, their heart rates were measured again.

In an experiment that investigates the effect of soil type on plant growth, the Independent variable is:

• The soil type.

• The plant weight.

• The growth time.

• The soil temperature.