Critical thinking

Question 1

Null hypothesis

Which significance levels is needed to reject null hypothesis

Answer 1

• states that there is no difference / significance
• significance level of 5% (calculated as p=0.05) =
  can reject the null hypothesis

Question 2

Types of data

Answer 2

Quantitative = How much
Categorical = What Type

Question 3

What does the mean + median show

Answer 3

Mean tells us the proportion of data

median reflects the distribution

Question 4

1. Standard deviation
2. Statements of Probability + confidence intervals

Answer 4

1. check formula for SD

2.
- x̄ ±1.96 x SD ≈ 95%
- x̄ ± 3 x SD ≈ 97%

x̄ = mean