The table t-value associated with 8 degrees of freedom and usedto calculate a 99% confidence interval is _______.
Select one:
a. 3.355
b. 1.860
c. 1.397
d. 2.896
Cameron Sinclair, Information Services Manager with GlobalFinancial Service (GFS), is studying employee use of GFS email fornon-business communications. He plans to use a 95% confidenceinterval estimate of the proportion of email messages that arenon-business; he will accept a 0.05 error. Previous studiesindicate that approximately 30% of employee email is not businessrelated. Cameron should sample _______ email messages.
Select one:
a. 14
b. 323
c. 457
d. 12
