Question 1 What is the difference between a point estimate and an interval estimate of a parameter Which is better Why What is necessary to determine sample size What is meant by a statistical test What is meant by the critical region The non critical region What is meant by a type I error A type II error How are they related What symbols are used to represent the probabilities of type I error and type II error What is meant by p value Question 2 A sample of 1000 children aged 12 to 16 showed that they spend an average of 75 minutes watching Television per day with standard deviation of 16 minutes Construct a 99 confidence interval for the mean time spent by all children aged 12 to 16 watching Television per day Interpret the confidence intervals Suppose the confidence interval in part (a) is too wide How you reduce the width of this interval

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Question: Question 1 What is the difference between a point estimate and an interval estimate of a parameter? Which is better? Why? What is necessary to

Question 1

What is the difference between a point estimate and an interval estimate of a parameter? Which is better? Why?
What is necessary to determine sample size?
What is meant by a statistical test?
What is meant by the critical region? The non-critical region?
What is meant by a type I error? A type II error? How are they related?
What symbols are used to represent the probabilities of type I error and type II error?
What is meant by p- value?

Question 2

A sample of 1000 children aged 12 to 16 showed that they spend an average of 75 minutes watching Television per day with standard deviation of 16 minutes.

Construct a 99% confidence interval for the mean time spent by all children aged 12 to 16 watching Television per day. Interpret the confidence intervals.
Suppose the confidence interval in part (a) is too wide. How you reduce the width of this interval?

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