Question

Smith is a weld inspector at a shipyard. He knows from keeping track of good and substandard welds that for the afternoon shift 5% of all welds done will be substandard. If Smith checks 300 of the 7500 welds completed that shift, what is the probability that he will find between 10 and 20 substandard welds? Round to four decimal places. A. 0.6377 B. 0.4066 C. 0.2033 D. 0.8147

Name: smith is a weld inspector at a shipyard he knows from keeping track of good and substandard welds that for the afternoon shift 5 of all welds done will be substandard if smith checks 300 of 90314
Uploaded: 2022-03-05T03:14:44-08:00
Duration: 1 min 45 s
Channel: Narayan Hari
Description: smith is a weld inspector at a shipyard he knows from keeping track of good and substandard welds that for the afternoon shift 5 of all welds done will be substandard if smith checks 300 of 90314

          Smith is a weld inspector at a shipyard. He knows from keeping track of good and substandard welds that for the afternoon shift 5% of all welds done will be substandard. If Smith checks 300 of the 7500 welds completed that shift, what is the probability that he will find between 10 and 20 substandard welds? Round to four decimal places.

A. 0.6377
B. 0.4066
C. 0.2033
D. 0.8147

smith is a weld inspector at a shipyard he knows from keeping track of good and substandard welds that for the afternoon shift 5 of all welds done will be substandard if smith checks 300 of 90314

Added by Charles B.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Narayan Hari

03/05/2022

Step 1

Let: n = number of trials (welds checked) = 300 p = probability of a weld being substandard = 5% = 0.05 X = number of substandard welds found We want to find the probability that Smith will find between 10 and 20 substandard welds, inclusive. This means we want Show more…

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Smith is a weld inspector at a shipyard. He knows from keeping track of good and substandard welds that for the afternoon shift 5% of all welds done will be substandard. If Smith checks 300 of the 7500 welds completed that shift, what is the probability that he will find between 10 and 20 substandard welds? Round to four decimal places. A. 0.6377 B. 0.4066 C. 0.2033 D. 0.8147