STAT 2510 FINAL 2026 LATEST QUESTIONS AND ANSWERS| ACE YOUR GRADES.

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STAT 2510 EXAM 3 2026 LATEST
QUESTIONS AND ANSWERS| ACE
YOUR GRADES.

Blood tests are used to screen possible donors for HIV. You
perform the following test. Ho: Donor does not HIV. Ha: Donor
has HIV.
The test indicates that the donor has HIV even though the donor
does not have HIV. What type of error is this? - correct answer -
Type I




Decide in each case whether or not you should reject the null
hypothesis Ho: u= 5 in favor of the alternative hypothesis Ha: u> 5
at significance level α = 0.05.


21.) z= -1.5 and n = 52


22.) z= 0.0002 and n = 52 - correct answer -Fail to reject


Fail to reject

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TRUE or FALSE? Decreasing the sample size decreases the
margin or error. - correct answer -FALSE




TRUE or FALSE? Decreasing the confidence level decreases the
margin of error. - correct answer -TRUE




A 95% confidence interval for μ is (33.2, 44.5). Based on the data
from which the confidence interval was constructed, someone
wants to test H0: μ = 30 versus Ha: μ ≠ 30. The P-value will be [ ].
- correct answer -Less than 0.05




Decide whether or not to reject the null hypothesis ( Ha: μ = 100)
in favor of the alternative hypothesis at significance level α = 0.05.
Using graph maybe helpful.


Critical values: z0.05 = 1.64, z0.025 = 1.96.


26.) Sample size n = 42, alternative hypothesis: Ha: μ < 100, test
statistic Z0 = 2.1.


27.) Sample size n = 42, alternative hypothesis: Ha: μ ≠ 100, test
statistic Z0= −3.1. - correct answer -fail to reject