Central Limit Theorem

Question

A simple random of 60 items resulted in a sample mean of 80. The population standard deviation is standard deviation=15

a) compute the 95% confidence for the population mean.

b) Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean.

c) What is the effect of a larger sample size on the interval estimate? 

Question

Z= Z1 Z2/ Z1 + Z2
Z1 =4+ j10 and Z2 = 12 -j3 

what is the impedance Z in both rectangular & polar form.

Question

2. State the Central Limit Theorem

3. Why do you think the Central Limit Theorem is important?

4. What is the relationship between Central Limit Theorem and Normal Distribution?