Q2 (a) The mass, x of each rubber in a random sample of 50 rubbers from a certain farm is measured in kilograms. It is summarized that Σx = 75.5 and Ex² = 118.42. Calculate the probability that the mean mass of the rubbers is between 1.45 kg and 1.55kg.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section: Chapter Questions
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The mass, x of each rubber in a random sample of 50 rubbers from a certain
farm is measured in kilograms. It is summarized that Σx = 75.5 and Ex² =
118.42.
Calculate the probability that the mean mass of the rubbers is between 1.45 kg
and 1.55kg.
(b)
An experiment was performed to compare the wear and tear of rubber shoes
produced by Factory A and B. It is known that the wear and tear of rubber shoes
produced by both factories are normally distributed. Table Q2 shows the
necessary data.
Q2 (a)
Transcribed Image Text:The mass, x of each rubber in a random sample of 50 rubbers from a certain farm is measured in kilograms. It is summarized that Σx = 75.5 and Ex² = 118.42. Calculate the probability that the mean mass of the rubbers is between 1.45 kg and 1.55kg. (b) An experiment was performed to compare the wear and tear of rubber shoes produced by Factory A and B. It is known that the wear and tear of rubber shoes produced by both factories are normally distributed. Table Q2 shows the necessary data. Q2 (a)
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