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Question 1

Determine z in the equation:1/(6z) = 2/9

Options :

A : 9/12

B : 2/54

C : 12/9

D : 18/2

Answer: A

Question 2

Sample mean = best point estimate of population mean?

Options :

A : True

B : False

C : Only for categorical data

D : Only when the sample size is 1

Answer: A

Question 3

Poisson used for:

Options :

A : Rare events per interval

B : Success/failure trials

C : Continuous data

D : Categorical data

Answer: A

Question 4

Dataset: 5, 7, 7, 10. Standard deviation?

Options :

A : 2.16

B : 3

C : 1.5

D : 0

Answer: A

Question 5

A team of scientists wants to understand the relationship between smoking and lung cancer. They collect datafrom 1,000 individuals, recording their smoking habits and whether they have been diagnosed with lungcancer. The scientists then analyze the data to find any correlations.Is this study observational or experimental?

Options :

A : Experimental, because the researchers are analyzing the data to find correlations.

B : Experimental, because the researchers are testing the effects of smoking on lung cancer.

C : Observational, because the study involves a large sample size.

D : Observational, because the researchers are collecting data without manipulating any variables.

Answer: D