Question

Are customers more satisfied with Airline A or Airline B? In order to provide its readers with information that can aid their decisions, a consumer group surveys 100 randomly selected passengers from each airline. On a 100 point scale, the average rating for Airline A passengers is 84 with a sample standard deviation of 18. On the same 100 point scale, the average rating for Airline B passengers is 88 with a sample standard deviation of 12. Use a 0.05 significance level and the StatCrunch output to determine if there is a difference between the two population means. Hypothesis test results: ?1 : Mean of Population 1 ?2 : Mean of Population 2 ?1 - ?2 : Difference between two means H0 : ?1 - ?2 = 0 HA : ?1 - ?2 ? 0 (without pooled variances) Difference Sample Diff. Std. Err. DF T-Stat P-value ?1 - ?2 -4 2.1633308 172.48454 -1.8490007 0.0662 Retain H0 Cannot determine Reject H0

          Are customers more satisfied with Airline A or Airline B? In order to provide its readers with information that can aid their decisions, a consumer group surveys 100 randomly selected passengers from each airline. On a 100 point scale, the average rating for Airline A passengers is 84 with a sample standard deviation of 18. On the same 100 point scale, the average rating for Airline B passengers is 88 with a sample standard deviation of 12. Use a 0.05 significance level and the StatCrunch output to determine if there is a difference between the two population means.
Hypothesis test results:
?1 : Mean of Population 1
?2 : Mean of Population 2
?1 - ?2 : Difference between two means
H0 : ?1 - ?2 = 0
HA : ?1 - ?2 ? 0
(without pooled variances)
Difference Sample Diff. Std. Err. DF T-Stat P-value
?1 - ?2 -4 2.1633308 172.48454 -1.8490007 0.0662
Retain H0
Cannot determine
Reject H0

Are customers more satisfied with Airline A or Airline B? In order to provide its readers with information that can aid their decisions, a consumer group surveys 100 randomly selected passengers from each airline. On a 100 point scale, the average rating for Airline A passengers is 84 with a sample standard deviation of 18. On the same 100 point scale, the average rating for Airline B passengers is 88 with a sample standard deviation of 12. Use a 0.05 significance level and the StatCrunch output to determine if there is a difference between the two population means.
Hypothesis test results:
?1 : Mean of Population 1
?2 : Mean of Population 2
?1 - ?2 : Difference between two means
H0 : ?1 - ?2 = 0
HA : ?1 - ?2 ? 0
(without pooled variances)
Difference Sample Diff. Std. Err. DF T-Stat P-value
?1 - ?2 -4 2.1633308 172.48454 -1.8490007 0.0662
Retain H0
Cannot determine
Reject H0

Added by April S.

Question

Please give Ace some feedback