Statistics 201 Exam 3 – Practice Exam
Fall 2022
Confidence Intervals – Chapter 19
Disclaimer:
This practice exam is provided solely for the purpose of familiarizing you with the format
and style of the Stat 201 exams. There is no explicit or implicit guarantee that the
upcoming exam will ask similar questions. If you use the practice exam as your only tool
to help you prepare for the upcoming exam, you most likely will not do well on the exam.
You should still do the things you would have done if you did not have access to this
practice exam, such as re‐read the text, go over your class notes, re‐work the online
homework problems, and look at the list of exam topics provided and make sure that you
understand all the concepts listed within it.
NOTE: These questions come from actual older exams. As such, the points on this
practice exam may total more than 100 points.
Please note: when asked to write out null and alternative
hypotheses, if appropriate, be sure to use proper mathematical
notation (i.e., use symbols such as , =, , , , , p, p̂, , x , etc.).
1
,Exam Grade:
2
, ON THIS EXAM, WHEN ROUNDING A FINAL NUMERICAL
ANSWER , PLEASE REPORT AT LEAST 3 SIGNIFICANT
DIGITS.
EXAMPLE: the value 0.000378516 should be rounded to 0.000379
1. Below is output from a hypothesis test for a single population mean based on 28
observations. The null hypothesized value, as well as the sample mean (“actual estimate”) are
seen below (among other numbers). Calculate the 3 missing values below. Show your work
(where necessary), but fill in your final answers in the blanklines below.
i) (2 points) DF :
ii) (2 points) Test Statistic :
iii) (2 points) Prob > |𝑡𝑡| :
3
Fall 2022
Confidence Intervals – Chapter 19
Disclaimer:
This practice exam is provided solely for the purpose of familiarizing you with the format
and style of the Stat 201 exams. There is no explicit or implicit guarantee that the
upcoming exam will ask similar questions. If you use the practice exam as your only tool
to help you prepare for the upcoming exam, you most likely will not do well on the exam.
You should still do the things you would have done if you did not have access to this
practice exam, such as re‐read the text, go over your class notes, re‐work the online
homework problems, and look at the list of exam topics provided and make sure that you
understand all the concepts listed within it.
NOTE: These questions come from actual older exams. As such, the points on this
practice exam may total more than 100 points.
Please note: when asked to write out null and alternative
hypotheses, if appropriate, be sure to use proper mathematical
notation (i.e., use symbols such as , =, , , , , p, p̂, , x , etc.).
1
,Exam Grade:
2
, ON THIS EXAM, WHEN ROUNDING A FINAL NUMERICAL
ANSWER , PLEASE REPORT AT LEAST 3 SIGNIFICANT
DIGITS.
EXAMPLE: the value 0.000378516 should be rounded to 0.000379
1. Below is output from a hypothesis test for a single population mean based on 28
observations. The null hypothesized value, as well as the sample mean (“actual estimate”) are
seen below (among other numbers). Calculate the 3 missing values below. Show your work
(where necessary), but fill in your final answers in the blanklines below.
i) (2 points) DF :
ii) (2 points) Test Statistic :
iii) (2 points) Prob > |𝑡𝑡| :
3
