Answer:
I don't think this is correct tho some of them do I dont think most of them are
Answer:
How effective is a new toothpaste in reducing cavities? Observational study
How does the daytime temperature affect the.....- Observational study
Which is a better absorber of heat.... - Controlled experiment
Can plants prepare food even In artificial light.- Controlled experiment
Why does a rolling ball slow down as it moves.- Controlled experiment
Please check if the answers are right first
Answer:
Z= 1.96
Explanation:
The Z score that corresponds to 95% is 1.96.
Answer: Lower CI=21-t(0.025, 16)*7/sqrt(17)=21-2.12*7/sqrt(17)=17.4
upper CI=21+t(0.025, 16)*7/sqrt(17)=21+2.12*7/sqrt(17)=24.6
Explanation: Because there both close and equal