BUAL 2650 Final Exam Questions with Complete Solutions 2024/2025
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Course
BUAL 2650
Institution
BUAL 2650
BUAL 2650 Final Exam Questions with Complete Solutions 2024/2025
alpha (a) - ANSWERS-level of significance
-allowance for a Type I error
-evidence is found significant we reject the null
Hypothesis testing of proportions uses what tables? - ANSWERSz tables
p-value - ANSWERS-the prob...
BUAL 2650 Final Exam Questions with
Complete Solutions 2024/2025
alpha (a) - ANSWERS-level of significance
-allowance for a Type I error
-evidence is found significant we reject the null
Hypothesis testing of proportions uses what tables? - ANSWERSz tables
p-value - ANSWERS-the probability of the null being true
-observed level of significance
1-test statistic from table
p-value < a - ANSWERSreject the null
test statistic > CV - ANSWERSwe reject the null
Two-Tailed p-value - ANSWERSthe p-value of a two tailed test is both shaded areas added together
An example in the judicial system - ANSWERSthe null is that the defendant is "not guilty"
Type I Error - ANSWERS-made in rejecting a null when it is actually true
-false positive
Type II Error - ANSWERS-failing to reject the null when in fact it is false
, -false negative
Power of a Test - ANSWERS-the ability of the test to make the correct decision of rejecting the null when
it is false
-making the right decision
-1-P(Type II) aka 1-Beta
-want it to be high
-as a increases, B decreases
Central Limit Theorem - ANSWERSsampling distribution of any mean becomes normal as the sample size
grows
Hypothesis testing of means uses what tables? - ANSWERS-t tables
-as degrees of freedom increase, t-models look more normal
How do we reduce both Type I & II errors? - ANSWERSwe increase the sample size
Paired Data - ANSWERSoccurs as "before and after"
What are the 3 properties of sample distribution and sample mean? - ANSWERS-the mean of the sample
means is equal to the population mean
-the standard deviation of the sample means is equal to the population standard deviation, divided by
the square root of n
-the standard error of the mean is the standard deviation of the sample means
Goodness of fit test - ANSWERS-determines if observed proportions conform to expected ones
-levels of classification (k)
-df = k - 1
Chi Square (x^2) - ANSWERS-the distribution used to test goodness of fit
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