For the sign test, n equals the number of differences in the sample that are ____________________.
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Q. 2In forming a 95 confidence interval for a population mean from a sample size of 20, the number of degrees of freedom from the t-distribution equals 20.
Indicate whether the statement is true or false
Q. 3When n is greater than or equal to 10, the sign test statistic has an approximate ____________________ distribution.
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Q. 4A race car driver tested his car for time from 0 to 60 mph, and in 20 tests obtained an average of 48.5 seconds with a standard deviation of 1.47 seconds. A 95 confidence interval for the 0 to 60 time is 45.2 seconds to 51.8 seconds.
Indicate whether the statement is true or false
Q. 5The sign test statistic has a(n) ____________________ distribution.
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Q. 6If the sampled population is nonnormal, the t-test of the population mean is still valid, provided that the condition is not extreme.
Indicate whether the statement is true or false
Q. 7The Wilcoxon signed rank sum test incorporates not only the sign of each difference, but the ____________________ of the difference as well.
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