Question

An energy drink company claims that its product increases students' memory levels. To support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from around the country) who tried their products reported improved memory. What is the missing component in this study?
a. control group
B. population
C. test group
d. random sample

Answer 1

@kroppot72

Answer 2

@Cosmichaotic

Answer 3

We have to have a sample of people representative of the population to compare the experiment results on, because there may be other factors in the general population, in this case, improving memory, that they are saying is because of the energy drink. For example, if all of the population in the random sampling were having improved memory due to something else, then the experiment wouldn't be valid.

These groups of people are used to measure how the deviation from the improvement of memory, in this case, to an average of the population.

These are called control groups.

Answer 4

can u answer one more please

Answer 5

A cosmetics company decides to compare its new nail polish product, Bella, with three other nail polish brands: Primrose, Shine, and Glo. In an experiment, participants are divided into four groups. Each group of women is asked to wear nail polish from one of the four brands. The results for Primrose, Shine, and Glo are compared with those for Bella, and a conclusion is drawn. What does the type of nail polish represent in this case?

Answer 6

the control group

the explanatory variable

the response group

the response variable

Answer 7

I'm trying to figure out what the independent and dependent variables are here. And I do not think there is enough information, but I could be wrong... Like what are we comparing? How much people like the color? Or what?

Answer 8

what does the nail polish represent in the short story

Answer 9

@Cosmichaotic

Answer 10

To be honest, I have no idea.