BUAL 2650 FINAL EXAM CORRECT 100%

BUAL 2650 FINAL EXAM CORRECT
100%

alpha (a) - ANSWER-level of significance
-allowance for a Type I error

-evidence is found significant we reject the null

Hypothesis testing of proportions uses what tables? - ANSWERz tables

p-value - ANSWER-the probability of the null being true
-observed level of significance

1-test statistic from table

p-value < a - ANSWERreject the null

Chi Square (x^2) - ANSWER-the distribution used to test goodness of fit
-difference between observed and expected count, squared
-x^2 > CV, we reject null
-is right skewed and becomes broader when the df is increased

Two-Tailed proportions - ANSWER-a/2 = level of significance
-CI = 1-a
-must find 2 z scores on each end of the bell

Dependent Variable - ANSWER-Y
-variable we wish to predict

Independent Variable - ANSWER-X
-variables that have an impact on Y


test statistic > CV - ANSWERwe reject the null

Two-Tailed p-value - ANSWERthe p-value of a two tailed test is both shaded areas
added together

An example in the judicial system - ANSWERthe null is that the defendant is "not
guilty"

Type I Error - ANSWER-made in rejecting a null when it is actually true
-false positive

Type II Error - ANSWER-failing to reject the null when in fact it is false
-false negative