Two independent samples are drawn from two normal populations, where the population variances are ...

Two independent samples are drawn from two normal populations, where the population variances are assumed to be equal. The sampling distribution of the ratio of the two sample variances is:
a. normal
b. Student-t
c. F
d. chi-squared

Q. 2

Which of the following smoothing constants causes the most rapid reaction to a change in the current time series value?
a. 0.40 c. 0.20
b. 0.30 d. 0.10

Q. 3

The test for the equality of two population variances is based on the:
a. difference between the two sample variances.
b. ratio of the two sample variances.
c. sum of the two sample variances.
d. product of the two sample variances.

Q. 4

For which of the following values of the smoothing constant w will the smoothed series catch up most quickly whenever the original time series changes direction?
a. 0.90 c. 0.40
b. 0.50 d. 0.10

Q. 5

The statistical distribution used for testing the difference between two population variances is the
a. Student t-distribution
b. standard normal distribution
c. F-distribution
d. None of these choices.

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Two independent samples are drawn from two normal populations, where the population variances are ...

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