The mean of a frequency distribution is given by
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Answer:
<u>75 ft²</u>
Step-by-step explanation:
Surface Area :
- Area (4 triangles) + Area (base)
- 4 x 1/2 x 5 x 5 + 5 x 5
- 50 + 25
- <u>75 ft²</u>
Based on the information given, it can be noted that the problem with the research is the problem of validity.
<h3>
Problems with validity.</h3>
It should be noted that in a research, a problem with validity takes place when there's a lack of reliability of the independent variable.
Also, it is a result of lack of representativeness of the independent variable and a lack of impact of the independent variable.
In this case, the researcher sets out to measure drug use on US college campuses by asking a representative sample of undergraduates whether they are currently receiving federal grants or loans. It should be noted that the question asked doesn't relate to the research.
In conclusion, there's a problem with validity.
Learn more about researches on:
brainly.com/question/25257437
