Majesty video production inc. wants the mean length of its advertisements to be 30 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 16 ads produced by majesty. what can we say about the shape of the distribution of the sample mean time

Step-by-step explanation:

Given that Majesty Video Production Inc. wants the mean length of its advertisements to be 30 seconds

Let X be the mean length of advts.

X is N(30, 2)

n =16

Std error of sample = 2/sqrt 16 = 0.5

The sample mean also will be normal with mean -30 and std dev = 0.5

So bell shaped symmetrical and uni modal

rectangle that is ther answer you

step-by-step explanation:

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.