Answer:
1, 2, 4
Step-by-step explanation:
Why is it necessary that researchers use randomization to assign each of the adults to a group?
- randomization ensures each group will be similar in everything except the time of day they are assigned to work
- randomization prevents the adults from selecting their own group
- randomization eliminates lurking variables from the experiment
- randomization prevents the researches from specifically assigning all adults who regularly stay up late to complete assigned tasks late at night
- randomization ensures that there will an equal number of adults in each group
Randomization ensures that there is no selection bias.
Answer:
I think it’s B
Step-by-step explanation:
I did the math and I’m pretty sure that it’s B
Answer:
11 positive integers can be expressed.
Step-by-step explanation:
Consider the provided information.
The number of possible prime numbers are 5,7,11,and 13.
There are 4 possible prime numbers.
How many positive integers can be expressed as a product of two or more of the prime numbers, that means there can be product of two numbers, three number or four numbers.
The formula to calculate combinations is: 
The number of ways are:




Hence, 11 positive integers can be expressed.
Answer:
x < 33.84
Step-by-step explanation:
we have
13.48x-200 < 256.12
Solve for x
Adds 200 both sides
13.48x-200 +200 < 256.12+200
13.48x < 456.12
Divide by 13.48 both sides
13.48x/13.48 < 456.12/13.48
x < 33.84
The solution is the interval ----> (-∞, 33.84)
All real numbers less than 33.84