For the interval estimation of when is known and the sample is large, the proper distribution to use is the
a. normal distribution.
b. t distribution with n degrees of freedom.
c. t distribution with n + 1 degrees of freedom.
d. t distribution with n - 1 degrees of freedom.
Question 2
All of the following are true about a cyclical pattern except it is
a. often due to multiyear business cycles.
b. often combined with long-term trend patterns and called trend-cycle patterns.
c. an alternating sequence of data points above and below the trend line.
d. usually easier to forecast than a seasonal pattern due to less variability in length of time.
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