Answered: Solve the following. Show your complete…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section4.5: Correlation And Causation

Problem 21PFA

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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? note: can you answer it in a written form please? thank you!

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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