In testing the difference between the means of two normally distributed populations, the number of degrees of freedom associated with the unequal-variances t-test statistic usually results in a non-integer number. It is recommended that you:
a. round to the nearest integer.
b. change the sample sizes until the number of degrees of freedom becomes an integer.
c. assume that the population variances are equal, and then use df = n1 + n2 - 2.
d. None of these choices.
Question 2
Seasonal variation is one of the four different components of a time series. These are cycles that occur over short repetitive calendar periods and, by definition, have duration of less than one year.
Indicate whether the statement is true or false
Primary aging means changes in hair color and skin texture for almost everyone.
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Testing the strength of the sternocleidomastoid muscle against resistance
Testing rapid alternating movement, palms up
The charge for telephone calls T is partly constant and partly varies with the number N of ...
Gene Flow Between Oak Populations