For each question, construct a normal distribution curve and label the horizontal axis. Then answer each question. 1. The mean life of a tire is 30 000 km. The standard deviation is 2000 km. a) 68% of all tires will have a life between km and km. km. km and b) 95% of all tires will have a life between c) What percent of the tires will have a life that exceeds 26 000 km? d) If a company purchased 2000 tires, how many tires would you expect to last more than 28 000 km? 2. The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days. a) About what percent of the products last between 9 and 15 days? b) About what percent of the products last between 12 and 15 days? c) About what percent of the products last 6 days or less? d) About what percent of the products last 15 or more days?
For each question, construct a normal distribution curve and label the horizontal axis. Then answer each question. 1. The mean life of a tire is 30 000 km. The standard deviation is 2000 km. a) 68% of all tires will have a life between km and km. km. km and b) 95% of all tires will have a life between c) What percent of the tires will have a life that exceeds 26 000 km? d) If a company purchased 2000 tires, how many tires would you expect to last more than 28 000 km? 2. The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days. a) About what percent of the products last between 9 and 15 days? b) About what percent of the products last between 12 and 15 days? c) About what percent of the products last 6 days or less? d) About what percent of the products last 15 or more days?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 22PFA
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Question
Do number 2 and 3. It’s not graded
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Step 1l
As per our guidelines we are supposed to answer only 1 question per post so I am solving first question only i.e question no. 2 please post the other questions separately to get answers
Given that
Mean(µ) = 12
Standard deviations (σ) = 3
X ~ N (µ, σ )= N (12, 3)
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