Week 6 Flashcards
What are the advantages of using the scientific method?
- Can be validated by replication
- Findings can be compared
- Enables evaluation of theories
Alternative hypothesis assume an effect will be present based on…
- Theoretical constructs
- Results from previous studies
- Past experiences or observations
H1 is the…
Alternate hypothesis
H0 is the…
Null hypothesis
Define population
All individuals in your inclusion area
Define sample
A subset of the population
What is a sampling error?
The difference between the values of the sample statistic and the population parameter
How do you reduce the chances of a sampling error?
By choosing the sample as representative of the population as possible
True or false
We assume that the null hypothesis is true
True
What is the P-value?
The p-value is the probability of how likely something observed is due to chance
If the P value is less than 0.05 what happens?
We can reject the null hypothesis
What is a type 1 error?
the researcher has erroneously claimed that they have found significant results when in reality these results are not significant
What is a type 2 error?
the researcher has erroneously claimed that they have found non-significant results when in reality these results are significant
What is the confidence interval (CL)?
The CL is the range of values that is likely to include the true population mean with a certain degree of confidence. It is often expressed as a % whereby a population mean lies between an upper and lower interval
Define effect size
This is a quantitative measure of the magnitude of the experimental effect. The larger the effect size the stronger the relationship between two variables
