A 2 sample t-test is used to compare two populations in which the experimental u

Question

A 2 sample t-test is used to compare two populations in which the experimental units are dependent

Why?

Question 2

Independent observations are associated with a completely randomized design

Why?

Question 3

Paired studies have a block design with just 2 treaments

Why?

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Question 4

Determine whether the following is an example of an independent (Completely Randomized Design) or dependent (Blocked Design) study:

The effectiveness of Prilosec for treating heartburn is tested by measuring gastric acid secretions in each patient before and again after drug treatment.  

Why?

Question 5

Twin studies are analyzed using a 2 sample t-test

Why?

Question 6

Determine whether the following is an example of an independent (Completely Randomized Design) or dependent (Blocked Design) study: The effect of a preservative as an ingredient is tested with a sample of cans of regular Coke and another sample of cans of diet Coke.

Block study

Why?

Explanation / Answer

Q 1 ) False because A 2 sample t-test is used to compare two populations in which the experimental units are independent

Option 1 ) False is correct

Q 2 ) True Independent observations are associated with a completely randomized design

the completely randomized design (CRD) refers to the random assignment of experimental units to a set of treatments.

Option 2 ) True is correct

Question 3 True

Paired studies have a block design with just 2 treaments.

The matched pairs design is a special case of a randomized block design.

It ia used when the experiment has only two treatment conditions; and subjects can be grouped into pairs, based on blocking variable.

Option 1 ) True is correct

Q 4 ) Given example is that

The effectiveness of Prilosec for treating heartburn is tested by measuring gastric acid secretions in each patient before and again after drug treatment.  

Here , Here drug treatment is given to the same patients befor and after. So. here the each patient receives two treatment drugs. So, this is paired data.

So this is dependent (Blocked Design) study

Option B )  dependent (Blocked Design) study is correct

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