statistics

What critical value t* from Table D should be used to construct the following: 95% confidence interval when n=11?

Assume that adults have IQ that are normally distributed w/ mean of u=100 and standard deviations =20 Find the probability a randomly selected adult has an IQ of less then 120

A recent study of 750 internet users in Europe found that 35% of internet users were women. What is the 95% confidence interval of the true proportion of women in Europe who use internet? A.0.349<p<0.351 B. 0.321<p<0.379 C. 0.316<p<0.384 D. 0.309<p<0.391

Define population and sampling unit for selecting a random sample in each of the following cases. A) Hundred voters from a constituency B) Twenty stocks of National Stock Exchange C) Fifty account holders of State Bank of India D) Twenty employees of Tata motors.

Standard deviation, the probability is 0.20 and value greater than 79.2. Normal distribution with mean of 62.4.