tut 2 Flashcards
(12 cards)
What does a significance (sig.) value below 0.05 in a normality test indicate?
The data is not normally distributed.
Which two tests are used in SPSS to assess normality?
Kolmogorov-Smirnov and Shapiro-Wilk tests.
Where do you find the option ‘Normality plots with test’ in SPSS?
In the Explore dialog box under Plots.
What does a Q-Q plot help you assess?
Whether the data follows a normal distribution.
How can you find a 95% confidence interval for the mean in SPSS?
Use Analyze > Descriptive Statistics > Explore and check ‘Confidence interval for mean’.
If you want to compare the DMF score between two groups, what should you check first?
Check normality of the data in each group separately.
How can you visually assess normality for each group in SPSS?
Use Q-Q plots or normality tests like Shapiro-Wilk for each group.
What does the Central Limit Theorem say about sample means?
Sample means will be approximately normally distributed if n ≥ 30.
What is the rule of thumb for sample proportions under the Central Limit Theorem?
Both np and n(1-p) should be ≥ 5.
What is the formula to check if sample size is large enough for a proportion (p)?
Ensure that np ≥ 5 and n(1−p) ≥ 5.
What is the proportion (p1) of children with medical insurance in the non-traced group (group 1)?
p1 = 10 / 100 = 0.10.
What is the proportion (p2) of children with medical insurance in the traced group (group 2)?
p2 = 10 / 20 = 0.50.
