Directions: Choose the best answer. 1. Which of the following checks are NOT made when constructing a confidence interval for
the difference of two means in an observational study.
a. Both samples are random selections from the population.
b. Both Populations are at least ten times bigger than the samples.
c. Both the expected number of successes and expected number of failures are
least 10
d. Both the samples are at least 30.

v: l•w•h÷2.

v: 20•6•8 ÷2

v: 960÷2

v: 480

step-by-step explanation:

ok one would be money, and the other would be refreshments or something similar. if each bag of popcorn is 5.00 and each drink is half of that that means drinks are 2.50 the proper way to do that would to look and see how much of each you can buy without exceeding a limit of 30.00

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x