Ms. Figgs asked 25 students in her 7th grade homeroom to select their favorite cookie. The results are recorded in the table bel
ow.
Based on the results, how many students will NOT select chocolate chip as there favorite cookie, if there are 250 students in the seventh grade? It would mean the world if someone could answer ASAP it’s my last question in my quiz for math.
Based on the results, how many students will NOT select chocolate chip as there favorite cookie, if there are 250 students in the seventh grade? It would mean the world if someone could answer ASAP it’s my last question in my quiz for math.
1 answer:
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Answer:
Step-by-step explanation:
Given that a researcher is trying to decide how many people to survey.
We have confidence intervals are intervals with middle value as the mean and on either side margin of error.
Confidence interval = Mean ± Margin of error
Thus confidence interval width depends on margin of error.
Margin of error =
Thus for the same confidence level and std deviation we find margin of error is inversely proportional to square root of sample size.
Hence for small n we get wide intervals.
So if sample size = 300, the researcher will get wider confidence interval