MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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The average amount of money spent for lunch per person in the college cafeteria is $6.67 and the standard
deviation is $2.92. Suppose that 44 randomly selected lunch patrons are observed. Assume the distribution
of money spent is normal, and round all answers to 4 decimal places where possible.
a. What is the distribution of X? X~ N(
b. What is the distribution of ? ~ N(
c. For a single randomly selected lunch patron, find the probability that this patron's lunch cost is
between $6.32 and $6.85.
d. For the group of 44 patrons, find the probability that the average lunch cost is between $6.32 and
$6.85.
e. For part d), is the assumption that the distribution is normal necessary? O No Yes
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Transcribed Image Text:The average amount of money spent for lunch per person in the college cafeteria is $6.67 and the standard deviation is $2.92. Suppose that 44 randomly selected lunch patrons are observed. Assume the distribution of money spent is normal, and round all answers to 4 decimal places where possible. a. What is the distribution of X? X~ N( b. What is the distribution of ? ~ N( c. For a single randomly selected lunch patron, find the probability that this patron's lunch cost is between $6.32 and $6.85. d. For the group of 44 patrons, find the probability that the average lunch cost is between $6.32 and $6.85. e. For part d), is the assumption that the distribution is normal necessary? O No Yes
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