Question 1

In a normal distribution, 95% of data lies within:

Options :

A : ±2 SD

B : ±1 SD

C : ±3 SD

D : ±4 SD

Answer: A

Question 2

A biologist is studying the relationship between plant species, species A, species B, and species C, and theaverage height of the plants.How should this study be classified?

Options :

A : Categorical#categorical

B : Categorical#quantitative

C : Quantitative#quantitative

D : Quantitative#categorical

Answer: B

Question 3

Probability of rolling an even number on a six-sided die?

Options :

A : 1/3

B : 1/2

C : 1/6

D : 2/3

Answer: B

Question 4

Uniform distribution 0–10: P(X < 4) = ?

Options :

A : 0.4

B : 0.6

C : 0.5

D : 0.25

Answer: A

Question 5

Sample mean = 40, SD = 8, n = 16. Standard error = ?

Options :

A : 2

B : 8

C : 0.5

D : 4

Answer: A