STT 231 EXAM 2 FINAL ASSESSMENT SCRIPT
2026 QUESTIONS AND ANSWERS GRADED
A+ VERIFIED SOLUTIONS PACK
●● How does sample size influence degrees of freedom?.
Answer: increase in sample size, increase in degrees of freedom
●● How does sample size effect the value of the test statistic "t"?.
Answer: increase in sample size, increase in test statistic
●● How does sample size influence the p-value?.
Answer: as sample size increases, p-value decreases
●● How does sample size influence MoE of your confidence interval?.
Answer: sample size increases, MoE of CI decreases
●● Decide in favor of H0 when HA is true.
Answer: Type 2 error
●● Decide in favor of HA when H0 is true.
Answer: Type 1 error
, ●● Decide in favor of HA when HA is true.
Answer: sensitivity/power
●● Decide in favor of H0 when H0 is true.
Answer: specificity
●● As the confidence interval increases from 95% to 99%, the width
becomes....
Answer: Wider
●● As the confidence interval decreases from 99% to 95%, the width
becomes....
Answer: Narrower
●● A p-value where p>0.10 means....
Answer: we have little evidence against the null
●● A p-value where 0.05<p≤0.10 means....
Answer: we have some evidence against the null
●● A p-value where 0.01<p≤0.05 means....
Answer: we have strong evidence against the null
2026 QUESTIONS AND ANSWERS GRADED
A+ VERIFIED SOLUTIONS PACK
●● How does sample size influence degrees of freedom?.
Answer: increase in sample size, increase in degrees of freedom
●● How does sample size effect the value of the test statistic "t"?.
Answer: increase in sample size, increase in test statistic
●● How does sample size influence the p-value?.
Answer: as sample size increases, p-value decreases
●● How does sample size influence MoE of your confidence interval?.
Answer: sample size increases, MoE of CI decreases
●● Decide in favor of H0 when HA is true.
Answer: Type 2 error
●● Decide in favor of HA when H0 is true.
Answer: Type 1 error
, ●● Decide in favor of HA when HA is true.
Answer: sensitivity/power
●● Decide in favor of H0 when H0 is true.
Answer: specificity
●● As the confidence interval increases from 95% to 99%, the width
becomes....
Answer: Wider
●● As the confidence interval decreases from 99% to 95%, the width
becomes....
Answer: Narrower
●● A p-value where p>0.10 means....
Answer: we have little evidence against the null
●● A p-value where 0.05<p≤0.10 means....
Answer: we have some evidence against the null
●● A p-value where 0.01<p≤0.05 means....
Answer: we have strong evidence against the null
