In testing the difference between the means of two normal populations using two independent samples when the population variances are unequal, the sampling distribution of the resulting statistic is:
a. normal. c. approximately normal.
b. Student-t. d. approximately Student-t.
Question 2
To calculate the five-period moving average for a time series, we average the value in that time period, the values in the two preceding time periods, and the values in the two following time periods.
Indicate whether the statement is true or false
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