stat_Sp_05_Ex_2a

stat_Sp_05_Ex_2a - Name: Student ID: Exam #2 Form A -...

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Name: Student ID: Exam #2 Form A - Statistics 211 Section 505 (Spring 2005) This test consists of six numbered pages. Make sure you have all 6 pages. It is your responsi- bility to inform me if a page is missing!!! You have 70 minutes to complete this test. Make sure you Fll out and “bubble in” the following items on the scantron sheet: – Last Name, ±irst Name, MI. – Dept (STAT), Course No (211), Section (505). – Social Security Number (enter your Student ID). – Test ±orm (A or B). – Enter the exam number, sign and date the form. You will loose credit if you fail to Fll out your scantron form correctly. You may use the 6 page crib sheet #2 from the web site, all appropriate tables and a calculator. If I provide partial results—assume they are correct and use them even if they are not. If there is no correct answer or if multiple answers are correct, select the best answer. There is no penalty to wrong answers . . . so guess if you do not know an answer. It is your responsibility to look at the overhead or blackboard about every 15 minutes and to incorporate any relevant information into your test. 1
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Chapter 4 [1] Suppose X N ( μ = 50 , σ 2 = 20 2 ) and P ( X < c - 50) = 0 . 5, then c is a) 100 b) 1 . 96 c) 60 d) 50 e) 50 + 1 . 96 × 20 [2] Suppose X has the following pdf . f ( x ) = k x for 1 < x < 2 . Then k is a) 1 . 0 b) x 2 x × x/ 2 c) 1 log 2 d) R 2 -∞ x 2 / 2 dx e) None of the above. [3] Suppose X has the following pdf . f ( x ) = x 2 for 0 < x < 2 . Let Q 1 be the Frst quartile of the distribution, then a) Q 1 = 5 b) R Q 1 0 x/ 2 dx = 0 . 25 c) R Q 1 0 x 2 / 2 dx = 0 . 25 d) R Q 1 -∞ x/ 2 dx = 0 . 5 e) None of the above. [4]
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This note was uploaded on 09/06/2008 for the course STAT 211 taught by Professor Parzen during the Spring '07 term at Texas A&M.

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stat_Sp_05_Ex_2a - Name: Student ID: Exam #2 Form A -...

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