DSCI3710E1_Key - COURSE DSCI 3710 Exam 1 5W2 2013 Print...

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

COURSE: DSCI 3710 Print Name: Exam 1 Signature: 5W2 2013 Student ID#: INSTRUCTIONS: ▪ Please print your name and student ID number on this exam. Also, put your signature on this exam. ▪ On your scantron PRINT your name and exam version. ▪ This exam contains 30 questions . You have 90 minutes to complete this exam. The exam is open book, open notes and open mind. Show all your work on the exam and mark all answers on the scantron. Usage of cell phones, digital cameras and other communication devices is prohibited. ▪ Please DO NOT pull this exam apart. When you have completed the exam, please turn your scantron and exam booklet into your instructor, at the front desk. Good luck and we wish you well on the exam. Note: Whenever question(s) are connected you may be asked to assume a result (given a value) as an answer for the previous question but this result (value) may or may not be correct. The procedure is set in place to prevent you from losing points on a subsequent question because you made a mistake on some previous question/s.
Image of page 1

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

Use the following paragraph for the next six questions. The market researchers at Jenn’s restaurant are interested in the proportion of male customers and female customers that would be willing to try a new salad. Random samples of 189 males and 138 females were randomly selected. Responses were recorded as Yes (i.e. interested) or No (i.e. not interested) and are listed as variables MalesInterested (1) and FemalesInterested (2). The samples indicated that 73 males and 92 females respectively were interested in trying a new salad. Test that the proportion of male customers interested is less than the proportion of female customers interested. Use a significance level of α= 0.05 for the test. The KPK Macro output is shown below. Z Test for Two Proportions Variable 1 Variable 2 Sample Proportion 0.386 0.666 Number of Observations 189 138 Ho:XXXX Ha:XXXX Z* -5.009 P[ Z Z*] 0.000 Z Critical, = 0.05 XXXX 1. What is the null hypothesis for the test? A. H o : p1 > p2 B. H o : p1 ≠ p2 C. H o : p1 ≥ p2* D. H o : p1 < p2 E. H o : p1 = p2 2. What is the point estimate of the proportion of females interested in trying a new salad? A. 0.386 B. 0.482 C. 0.289 D. 0.666* E. 0.025 3. What is the critical (table) value of the test statistic?
Image of page 2
4. What is the calculated value of the test statistic?
Image of page 3

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

Image of page 4
This is the end of the preview. Sign up to access the rest of the document.
  • Spring '08
  • Dr.Jay
  • Statistics, Statistical hypothesis testing, significance level, B. Reject Ho

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern