D long-distance telephone calls made by a company indicates that the length d). at a call lasted less than 190 seconds? sted less than 190 seconds is es as needed.) at a call lasted between 190 and 320 seconds? sted between 190 and 320 seconds is. es as needed.) at a call lasted more than 320 seconds? sted more than 320 seconds es as needed.)

MATLAB: An Introduction with Applications
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Chapter1: Starting With Matlab
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A statistical analysis of 1,000 long-distance telephone calls made by a company indicates that the length of these calls is normally distributed, with a mean of 240 seconds and a standard deviation of 40 seconds.
Complete parts (a) through (d).
a. What is the probability that a call lasted less than 190 seconds?
The probability that a call lasted less than 190 seconds is.
(Round to four decimal places as needed.)
b. What is the probability that a call lasted between 190 and 320 seconds?
The probability that a call lasted between 190 and 320 seconds is.
(Round to four decimal places as needed.)
c. What is the probability that a call lasted more than 320 seconds?
The probability that a call lasted more than 320 seconds
(Round to four decimal places as needed.)
d. What is the length of a call if only 2.5% of all calls are shorter?
2.5% of the calls are shorter than
seconds.
(Round to two decimal places as needed.)
Transcribed Image Text:A statistical analysis of 1,000 long-distance telephone calls made by a company indicates that the length of these calls is normally distributed, with a mean of 240 seconds and a standard deviation of 40 seconds. Complete parts (a) through (d). a. What is the probability that a call lasted less than 190 seconds? The probability that a call lasted less than 190 seconds is. (Round to four decimal places as needed.) b. What is the probability that a call lasted between 190 and 320 seconds? The probability that a call lasted between 190 and 320 seconds is. (Round to four decimal places as needed.) c. What is the probability that a call lasted more than 320 seconds? The probability that a call lasted more than 320 seconds (Round to four decimal places as needed.) d. What is the length of a call if only 2.5% of all calls are shorter? 2.5% of the calls are shorter than seconds. (Round to two decimal places as needed.)
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