Using a statistical table

Question 1

What is the rule of R?

Answer 1

-Any test that has an R in the name must have a calculated value greater or equal to the critical value and those without an R should have a calculated value equal to or less than the critical value.

Question 2

What factors determine what statistical test is used?

Answer 2

• Whether we are investigating a difference or a correlation
• What type of experimental design is used
• What level of measurement is used (Nominal,Internal,Ordinal)

Question 3

What are the three criteria needed for parametric tests to be used?

Answer 3

• It must be interval data
• It must be normally distributed data
• There should be homogeneity of variance

Question 4

What is nominal data?

Answer 4

-It is categorical data where there are no intervals

Question 5

What is ordinal data?

Answer 5

It is data that is in order but there are no intervals as it is subjective and units of measurement are not of equal size

Question 6

What is interval data?

Answer 6

It is data where units of measurement are of equal size.

Question 7

Table for statistical tests?

Answer 7

first line=Unrelated design/related design (Differences)/Correlation

Second line= Nominal data/chi-squared/sign test/chi-squared

Third line= Ordinal data/mann whitney/Wilcoxon/spearmans rho

fourth line= Interval data/unrelated t-test/related t-test/pearsons r

Question 8

How do we use the sign test?

Answer 8

1- Work out the number of differences
2-work out the least common sign (S value/calculated)
3-Workout the total number of signs excluding 0 (N value)
4-refer back to the hypothesis on whether it was directional or non directional
5-Identify N value and then identify if S value matches the critical value

Question 9

Exam structure for statistical test if there is a significance or not

Answer 9

The alternative or the null hypothesis must be accepted as the calculated value of (#) is greater/ or less than the critical value of (#) therefore the result is or is not significant.