Answer: 2. It is likely that a confounding variable could be a contributing explanation for the difference between these two groups.
3. This is an observational study, not an experiment.
Step-by-step explanation:
Based on the information given, the statement that's true include:
• It is likely that a confounding variable could be a contributing explanation for the difference between these two groups.
• This is an observational study, not an experiment.
It is an observational study as the researcher observed just observed the scenarios without him trying to change the people that are being exposed to it or controlling it.
Therefore, the correct options are II and III only.
Width - x
Length - (x+12)
Area - x(x+12)
x(x+12)=220
x²+12x-220=0 -220 =22*(-10), 12=22-10
(x+22)(x-10)=0
x=-22, x=10
For width, we can use the only positive number,
so, the width is 10 feet.
Length is 10+12=22 feet.
Increase=5%of 4
=5÷100×4=0.2
So 4+0.2=4.2litres
Hello There!
The number +10 can be used to indicate a 10-degree rise in temperature.
This is because this is an increase. All of the other options are a decrease meaning that there going down from where they were originally.
Complete Question
Let R unrestricted and R restricted be 0.4366 and 0.4149 respectively. The difference between the 9) unrestricted and the restricted model is that you have imposed two restrictions. There are 420 observations. The F-statistic in this case is:_______
A) 10.34
B) 4.61
C) 7.71
D) 8.01
Answer:
The correct option is D
Step-by-step explanation:
From the question we are told that
The
The
The number of observation is n= 420
Generally the number of independent variables is k() = 3
Then the number of restriction is (i.e ) is q = 2
Generally the F-statistics is mathematically represented as
substituting values