Shaver manufacturing inc. offers a dental insurance to its employees. A recent study by the human resource director shows the annual cost per employee per year followed the normal probability distribution with the mean of $1280 and the standard deviation is $420 per year. a. What is the probability that annual dental expense are more than $1500? b. What is the probability that annual dental expense are between $1500 and $2000? c. Estimate the probability that an employee had no annual dental expenses.

Shaver manufacturing inc. offers a dental insurance to its employees. A recent study by the human resource director shows the annual cost per employee per year followed the normal probability distribution with the mean of $1280 and the standard deviation is $420 per year. a. What is the probability that annual dental expense are more than $1500? b. What is the probability that annual dental expense are between $1500 and $2000? c. Estimate the probability that an employee had no annual dental expenses.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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