Q1.
- Explain what happens to the 95 % confidence interval as thesample size increases.
- Explain what happens to the width of the confidence intervalfor a 99% interval versus a 95%.
Q2. Consider the population of adult females resident inMelbourne. Our focus is on the population mean height. Assume we donot know ? (population standard deviation) or thepopulation mean, µ. We take a sample of adult females resident inMelbourne (n=100) and calculate the sample mean height as 70 cm andthe sample standard deviation as 25cm.
- Derive the 95% confidence interval for the population mean
- Compare your interval here and last week – which is larger andwhy?
