exam1_A - STA 3024 Introduction to Statistics 2 Section...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
STA 3024 Introduction to Statistics 2 EXAM 1 Section 5126 Form A Exam 1, Page 1 STA 3024 Examination 1 We, the members of the University of Florida community, pledge to hold ourselves and our peers to the highest standards of honesty and integrity. Name:______________________________ UFID #: ____________________________ Signature: ______________________________ There are 25 multiple-choice problems. Each problem is worth 4 points. The exam starts at 12:30pm and ends at 1:45pm. Good luck! Some formulas which you might find useful are:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
STA 3024 Introduction to Statistics 2 EXAM 1 Section 5126 Form A Exam 1, Page 2
Background image of page 2
EXAM 1 Section 5126 Form A Exam 1, Page 3 1) A chi-squared test for a contingency table of education level and happiness level yield a P-value of 0.017. Using α=0.025, we A. Reject H 0 and we conclude the variables are dependent B. Reject H 0 and conclude that’s reasonable that the variables are independent C. Fail to reject H 0 and conclude that the variables are dependent D. Fail to reject H 0 and conclude that its reasonable that the variables are independent E. None of the above 2) Cars-R-Us claims that its newest hybrid sedan, the Nogo, will average better than 50 miles per gallon in the city. Identify the Type I Error for the test. A. The error of failing to reject that the mean is 50 mpg when it is actually greater than 50 mpg B. The error of rejecting that the mean is 50 mpg when it is really 50 mpg C. The error of rejecting that the mean is 50 mpg when it is really more than 50 mpg D. The error of failing to reject that the mean is more than 50 mpg when it is really equal to 50 mpg E. None of the above 3) What is the correct order in which to perform the five steps of a hypothesis test? A. Assumptions, Test statistic, Hypotheses, P-value, Decision B. Assumptions, Hypotheses, Test statistic, P-value, Decision C. Hypotheses, Assumptions Test statistic, P-value, Decision D. Test statistic, P-value, Assumptions, Hypotheses, Decision 4) A chi-squared test for a table with five rows and three columns yields a test statistic value of 0 2 = 30.17 Which of the following statements are true? I. This 0 2 value represents evidence of a very strong association between the two variables. II. A 0 2 value this large would be very unusual if the variables are independent. A. Both I and II are true.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/15/2011 for the course STA 3024 taught by Professor Ta during the Spring '08 term at University of Florida.

Page1 / 9

exam1_A - STA 3024 Introduction to Statistics 2 Section...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online