MATH 3339 final Exam Questions with Correct Answers Latest Update 2025-2026
r close to 1 - Answers strong linear relationship
r close to 0 - Answers no linear relationship at 0. near 0 is weak linear relationship
In the regression equation y = b0 + b1x, identify what b0 and b1 represent. Which of
these will best explain the relationship between x and y - Answers bo represents the y intercept.
and b1 represents the slope of the line. the slope will best explain the relationship because for
every 1 x goes up then y goes up b1.
conditional probability - Answers P(a&b)/P(b)
to find a zscore corresponding to a percentile - Answers qnorm(.percentile)
standard error - Answers sqrt(p(1-p)/n)
pvalue for t test stastic - Answers qt(t value,df)
verify that its a binomial experiment - Answers -success or fail only
-fixed # of trials
-outcomes are independent
r studio commands for binomial experiments
p(x=k)
p(x<=k)
p(x>k) - Answers dbimon(k,n,p)
pbinom(k,n,p)
1-pbinom(k,n,p)
k= the outcome
n=number of trials
p=probability
anova table - Answers df. ss ms f
treatments I-1 SSTr MSTr MSTr/MSE
error I(J-1) SSE MSE
r close to 1 - Answers strong linear relationship
r close to 0 - Answers no linear relationship at 0. near 0 is weak linear relationship
In the regression equation y = b0 + b1x, identify what b0 and b1 represent. Which of
these will best explain the relationship between x and y - Answers bo represents the y intercept.
and b1 represents the slope of the line. the slope will best explain the relationship because for
every 1 x goes up then y goes up b1.
conditional probability - Answers P(a&b)/P(b)
to find a zscore corresponding to a percentile - Answers qnorm(.percentile)
standard error - Answers sqrt(p(1-p)/n)
pvalue for t test stastic - Answers qt(t value,df)
verify that its a binomial experiment - Answers -success or fail only
-fixed # of trials
-outcomes are independent
r studio commands for binomial experiments
p(x=k)
p(x<=k)
p(x>k) - Answers dbimon(k,n,p)
pbinom(k,n,p)
1-pbinom(k,n,p)
k= the outcome
n=number of trials
p=probability
anova table - Answers df. ss ms f
treatments I-1 SSTr MSTr MSTr/MSE
error I(J-1) SSE MSE
