Stats definitions (exam 3)

If two independent large samples are selected from two populations, the sampling distribution of the difference between the two sample means _____.

can be approximated by a normal distribution

SSE can never be _____.

larger than SST

In hypothesis testing, the critical value is ___

a number that establishes the boundary of the rejection region

Independent simple random samples are selected to test the difference between the means of two populations whose variances are not known. The sample sizes are n1 = 32 and n2 = 40. The correct distribution to use is the _____ distribution.

t

In hypothesis testing, the alternative hypothesis is _____.

the hypothesis concluded to be true if the null hypothesis is rejected

Which of the following does NOT need to be known in order to compute the p-value?

the level of significance

If two variables, x and y, have a strong linear relationship, then _____.

there may or may not be any causal relationship between x and y

In a regression analysis, if r^2 = 1, then _____.

SSR = SST

In regression analysis, the variable that is being predicted is the _____.

dependent variable

If the cost of a Type I error is high, a smaller value should be chosen for the _____.

level of significance

If a hypothesis is rejected at a 5% level of significance, it _____.

may be rejected or not rejected at the 1% level

If the coefficient of correlation is a positive value, then the slope of the regression line _____.

must also be positive

If the coefficient of correlation is a negative value, then the coefficient of determination _____.

must be positive

The required condition for using an ANOVA procedure on data from several populations is that the _____.

sampled populations have equal variances

In hypothesis testing, the hypothesis tentatively assumed to be true is _____.

the null hypothesis