PSY173 quiz 2

What does trimming the data mean?

• Substituting outliers with the highest value which isnt an outlier

• Deleting a certain amount of scores

• Boostrapping the data

• Applying a mathematical function to scores

if a Z-score is at 1.96 or lower it is...

• Good, non significant

• Bad, non significant

• Good, significant

• Bad, significant

Shapiro wilk shows us...

• If our variances are equal

• How peaked or flat the data is

• If the data is normally distributed

• Which direction the data is in

Which 2 p values show that Levenes test has NOT been violated?

• >0.05

• 0.06

• <0.05

• 0.80

Where should an outlier typically sit on a normal distribution?

• Inside the 95%

• Inside the 99.7%

• Outside the 99.7%

• Outside the 95%

What 3 things do you need to establish an experimental design or what 3 things benefit an experimental design?

• Covariation

  Temporal precedence

  external variables

• Variation

  Temporal precedence

  external variables

• Covariation

  Temporal precedence

  extraneous variables

• Variation

  Temporal precedence

  extraneous variables

Which describes temporal preceedence?

• A factor other than the intended treatment that might change the outcome variable.

• when changes in the suspected cause (treatment) occur before changes in the effect (outcome). Helps determine which variable is the cause and which is the effect.

• When changes in one variable are associated with changes in another variable; part of determining causality.

• The degree to which a study parallels everyday situations in the real world.

What is cohen's D?

• a statistic showing that if the results happened by chance if the 2 variables were truly unrelated.

• The degree to which a study parallels everyday situations in the real world.

• A statistic used to evaluate the internal reliability of a scale

• a statistical measure of the magnitude of the difference between groups.

What is the difference between independent and paired t-test?

• Independent has1 group which do both conditions and paired has 2 separate groups and

• Independent has a cohens d and paired doesn't

• Independent has 2 separate groups and paired has 1 group which do both conditions

• Paired has a cohen's d and independent doesn't

Which is not a type of within-group t-test design?

• pretest-postest

• cross-sectional

• repeated measures

• longitudinal