The probability density function of the time it takes a hematology cell counter to complete a test on a blood sample is f(x)=0.04 for 57

Intermediate Algebra
10th Edition
ISBN:9781285195728
Author:Jerome E. Kaufmann, Karen L. Schwitters
Publisher:Jerome E. Kaufmann, Karen L. Schwitters
Chapter11: Exponential And Logarithmic Functions
Section11.S: Summary
Problem 15S
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QUESTION 9
The probability density function of the time it takes a hematology cell counter to complete a test on a blood sample is
f(x)=0.04 for 57<x<82 seconds.
Round your answers to 2 decimal places.
(a) What proportion of tests require more than 70 seconds to complete?
(b) What proportion of tests require less than one minute to complete?
(c) Determine the mean and variance of the time to complete a test on a sample.
Mean =
seconds
seconds
2
Variance =
Transcribed Image Text:QUESTION 9 The probability density function of the time it takes a hematology cell counter to complete a test on a blood sample is f(x)=0.04 for 57<x<82 seconds. Round your answers to 2 decimal places. (a) What proportion of tests require more than 70 seconds to complete? (b) What proportion of tests require less than one minute to complete? (c) Determine the mean and variance of the time to complete a test on a sample. Mean = seconds seconds 2 Variance =
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