Suppose you want to form a 80% confidence interval in each of the following situ

Question

Suppose you want to form a 80% confidence interval in each of the following situations:

1. Average cholesterol in sample of 28 individuals, where x cholesterol is before an experiment, and y cholesterol is after the experiment.

2. A sample of 28 individual's weight, where the population standard deviation is 6.

3. A sample of 20 individuals where 50% prefer a particular policy.

4. A sample of 28 individual's height.

5. A regression coefficient, with a sample size of 28.

Briefly write out the confidence interval you would use in each case, and what changes through each of the described scenarios.

Explanation / Answer

1) I will use T distribution

2) I will use Z distribution

3) Z distribtuion

4) T distribtuion

5) T distribution

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