Question
DATA205 Introductory Analytics (QC)
Lab Assignment 6
Confidence Intervals
Answer the following for each of your 3 assigned
interval/ratio variables:
1. What is the confidence interval? In words, what does
this mean?
(Be sure to refer to the metric [years, hours, points, etc]
for the variables you are describing)
2. What is the best point estimate for the mean?
(Single number for population mean)
Answer these general questions (single response):
3. Given a 99% confidence level, in what percent of all
possible samples would the same conclusions be reached?
4. Given a 99% confidence level, what is the probability that
you are incorrect?
5. If the confidence level was decreased to 95% what would
happen to the width of the confidence interval: Narrower or Wider?
6 If the sample size was decreased what would happen to
the width of the confidence interval: Narrower or Wider?
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