The sample space refers to _____. a. any particular experimental ...

[schs14]

The sample space refers to _____.
 a. any particular experimental outcome
  b. the sample size minus 1
  c. the set of all possible experimental outcomes
  d. both any particular experimental outcome and the set of all possible experimental outcome

Question 2

The makers of a soft drink want to identify the average age of its consumers. A sample of 55 consumers was taken. The average age in the sample was 21 years with a standard deviation of 4 years.
 a. Construct a 95 confidence interval for the true average age of the consumers.
  b. Construct an 80 confidence interval for the true average age of the consumers.
  c. Discuss why the 95 and 80 confidence intervals are different.

[milbourne11]

Answer to Question 1

c

Answer to Question 2

a. 19.92 to 22.08 years (rounded)
b. 20.30 to 21.70 years (rounded)
c. As the level of confidence decreases, the confidence interval gets narrower.