Answer:
The correct option is;
We cannot infer a cause and effect relationship because we do not have a control group
Step-by-step explanation:
The treatment in research involves giving stimulus known as treatment to a group or portion of the sample which are then known as the treatment group while the remaining portion of the the sample are exempted from the stimulus. A successful treatment manipulation is one where members of the treatment group perform higher in the measured metrics of the research than members of the control group.
Given that the researchers gathered data from a random sample of drivers and measurement of several variables including the explanatory variable of the of the research without subjecting a sample to a treatment or having a control group we cannot infer a cause and effect relationship as there are no control group
Answer:

Step-by-step explanation:
Given:

Required
Equivalent expression without fraction
To do this, we simply multiply through by a common multiple of the denominators in the expression.
The denominators are 2 and 3


So, 6 is the least common multiple.
Multiply both sides by 6




<em>Hence, an equivalent expression.</em>
Answer:
7x^16. Step-by-step solution in the attachment.
U need to didvid the donuts price to the pricwao coffe nd the coffe price to donut price
Only like sedans: 25- 15 = 10
Only like hatchbacks: 40-15 = 25
Like both: 15
Like none of them: 100-10-25-15 = 50
Dislike sedans: 100 - 10-15 = 75
Dislike hatchbacks: 100-25-15 = 60
So dislikes: sedans>hatchbacks