Majesty video production inc. wants the mean length of its advertisements to be 24 seconds. assume the distribution of ad length follows the normal distribution with a population standard deviation of 2 seconds. suppose we select a sample of 15 ads produced by majesty. what can we say about the shape of the distribution of the sample mean time?

It is going to be bell-shaped(normally distributed), with mean and standard deviation .

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean and standard deviation , a large sample size can be approximated to a normal distribution with mean and standard deviation .

What can we say about the shape of the distribution of the sample mean time?

It is going to be bell-shaped(normally distributed), with mean and standard deviation .

example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.