Unknown lifelength of the manufacturers bulbs fixed

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Unformatted text preview: 16 ¦ ¥ Put a random sample of hours. ¤ © Data :  ¢  ¢ # 2     ¢ ¢ © bulbs on test, Can the claim be made? (VALIDLY) ) record time to burnout for each.  that the average lifetime of our bulbs exceeds 1325 Ex. : A manufacturer of light bulbs would like to claim Tests of Hypotheses: Section 8.1 #$ #$   ¢ £ ¡¢ £ ¤¢ £ © © © Decision is to be made using sample data. UNKNOWN ) lifelength of the manufacturer’s bulbs. ( FIXED, but true mean (ALTERNATIVE hypothesis) (NULL hypothesis) We do not know the true value of ¡ ¡ Choose between two HYPOTHESES. ¡ © 215 216 Sample DOES NOT contain ALL of the information STA 2023 c D.Wackerly - Lecture 16 Ho true Type I error Reject Ho – Claim Type II Error – Claim Type I Error Correct Type II error when really when really Consider the lightbulb example Correct Accept Ho Ha true Reality Decision p. 325) possibility of making an ERROR. (See Table 8.1, Using sample data to make decision – always the about the POPULATION. © © © © STA 2023 c D.Wackerly - Lecture 16 ¢ £ Suppose (p. 323) (p. 325) How about both very small? and © £ ” Type II Error – Leading to an – Thus, “accept must decide to “reject – If we want to REDUCE ¢ ” ¡ in 217 OFTEN. Type I Error we . OFTEN. to be is a fixed sample size. Ideally, want BOTH © ¢ are PROBABILITIES ¡ ( numbers between 0 and 1 ) and £ ©...
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This note was uploaded on 12/15/2011 for the course STA 2023 taught by Professor Ripol during the Spring '08 term at University of Florida.

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