A random sample of 50 suspension helmets used by motorcycle riders and automobile race-car drivers was subjected to an impact test, and on 18 of these helmets some damage was observed.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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A random sample of 50 suspension helmets used by motorcycle riders and automobile race-car drivers was subjected to an impact test, and on 18 of these helmets some damage was observed.

 
 
(b) Using the point estimate of p obtained from the preliminary sample of 50 helmets, how many helmets must be tested to
be 95% confident that the error in estimating the true value of p is less than 0.03?
i 983.44959999
n=
eTextbook and Media
X Incorrect. Try again. Remember to round up to the nearest whole number.
(c) How large must the sample be if we wish to be at least 95% confident that the error in estimating p is less than 0.03,
regardless of the true value of p?
n= i 1067
eTextbook and Media
Transcribed Image Text:(b) Using the point estimate of p obtained from the preliminary sample of 50 helmets, how many helmets must be tested to be 95% confident that the error in estimating the true value of p is less than 0.03? i 983.44959999 n= eTextbook and Media X Incorrect. Try again. Remember to round up to the nearest whole number. (c) How large must the sample be if we wish to be at least 95% confident that the error in estimating p is less than 0.03, regardless of the true value of p? n= i 1067 eTextbook and Media
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