Question

since many people have trouble

M ULJIVE appropriate assumptions and conditions are met. Assume assumptions and conditions to perform Intro Stats Written 9a This written work is worth twice the points as previous written works 1. Since many people have trouble programming their DVD players, an electronics company had developed what it hopes will be easier instructions. The goal is to have at least 92% of customers succeed at being able to program their DVD players. The company tests the new system on 100 people, 88 of whom were successful. Is this strong evidence that the new system fails to meet the company's goal? A students test of this hypothesis is provided. How many mistakes can you find? a. Identify and correct any mistakes in the 3: Student's Test of Hypothesis students statement of the null and alternative hypothesis, if there are not mistakes state so. The student's test of the hypothesis is shown here. HD 0.92 HAD 0.92 SRS (Simple Random Sample) 0.92/100) > 10 100 0.88 GO - 0.880.125 1000032 b. Identify any mistakes in the student's verification of assumptions and conditions. if there are mistakes state the correct verifications 0.88 -0.92 0032 -1.25 P-Piza - 1.25) = 0.11 There is weak evidence that the new system does not work c. Identify any mistakes in the students calculation of the P-value. If there are mistakes show the correct calculations and P-value. d. Identify any mistakes in the students conclusion Problems taken from Intro Stats by De Veaux Velleman Bock published by Pearson Education.

Answer 1

ca) Hoi >0.92 Hipe 0.92 (b) SRS 100 x 0.92 - 92 >10 cc) p-value = P(Z <1 -1.25) = 0.11 There is insufficient evidence to conclude that the new system fails to meet the company's goal.