Solve the following. Show your complete solution. Suppose that the amount of time takes place the Bureau of Internal Revenue (BIR) to send refunds to taxpayers is normally distributed with a mean of 15 weeks and a standard deviation of 4 weeks. a. What proportion of taxpayers should get a refund within 7 weeks? b. How long will it take before 67% of taxpayers get their refund?
Solve the following. Show your complete solution. Suppose that the amount of time takes place the Bureau of Internal Revenue (BIR) to send refunds to taxpayers is normally distributed with a mean of 15 weeks and a standard deviation of 4 weeks. a. What proportion of taxpayers should get a refund within 7 weeks? b. How long will it take before 67% of taxpayers get their refund?
Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter7: Applying Fractions
Section7.2: Proportions
Problem 47WE
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Question
Solve the following. Show your complete solution.
Suppose that the amount of time takes place the Bureau of Internal Revenue (BIR) to send
refunds to taxpayers is normally distributed with a mean of 15 weeks and a standard deviation
of 4 weeks.
a. What proportion of taxpayers should get a refund within 7 weeks?
b. How long will it take before 67% of taxpayers get their refund?
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