8 The masses of 80 castings were determined with the following results: Mass x (kg) 7:3 7.4 7-5 7-6 7:7 7-8 Frequency f 4 13 21 23 14 5 (a) Calculate (i) the mean mass, (ii) the standard deviation from the mean. (b) For a batch of 2000 such castings, determine (i) the likely limits of all the masses and (ii) the number of castings likely to have a mass greater than 7-43 kg.
8 The masses of 80 castings were determined with the following results: Mass x (kg) 7:3 7.4 7-5 7-6 7:7 7-8 Frequency f 4 13 21 23 14 5 (a) Calculate (i) the mean mass, (ii) the standard deviation from the mean. (b) For a batch of 2000 such castings, determine (i) the likely limits of all the masses and (ii) the number of castings likely to have a mass greater than 7-43 kg.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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I am not able to copy the worded version of these questions, however i am a student in dire help please help me solve these questions presented on the pictures thank you.
Transcribed Image Text:8 The masses of 80 castings were determined with the following results:
Mass x (kg)
7-3
7-4
7-5
7-6
7-7
7-8
Frequency f
4
13
21
23
14
5
(a) Calculate (i) the mean mass, (ii) the standard deviation from the
mean.
(b) For a batch of 2000 such castings, determine (i) the likely limits of all
the masses and (ii) the number of castings likely to have a mass
greater than 7.43 kg.
Transcribed Image Text:7 Components are machined to a nominal diameter of 32-65 mm. A sample
batch of 400 components gave a mean diameter of 32-66 mm with a
standard deviation of 0-02 mm. For a production total of 2400
components, calculate:
(a) the limits between which all the diameters are likely to lie
(b) the number of acceptable components if those with diameters less
than 32-62 mm or greater than 32-68 mm are rejected.
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