ish Sunited States ACTIVITY SHEET Exercises 1. Answer the following 1. A psychologist claims that the mean age at which children start walking is 125 months. The following data give the age at which 18 randomly selected children started walking. 15 11 13 14 15 12 15 10 16 17 14 16 13 15 15 14 11 13 Test at the 1% level of significance if the mean age at which children start walking is different from 12.5 months 2. A sample of 800 items produced on a new machine showed that 48 of them are defective. The factory will get rid the machine if the data indicates that the proportion of defective items is significantly more than 5%. At a significance level of 10% does the factory get rid of the machine or not? 3. A manufacturer of electric lamps is testing a new production method that will be considered acceptable if the lamps produced by this method result in a normal population with an average life of 2,400 hours and a standard deviation equal to 300. A sample of 100 lamps produced by this method has an average life of 2,320 hours. Can the hypothesis of validity for the new manufacturing process be accepted with a risk equal to or less than 5%?
ish Sunited States ACTIVITY SHEET Exercises 1. Answer the following 1. A psychologist claims that the mean age at which children start walking is 125 months. The following data give the age at which 18 randomly selected children started walking. 15 11 13 14 15 12 15 10 16 17 14 16 13 15 15 14 11 13 Test at the 1% level of significance if the mean age at which children start walking is different from 12.5 months 2. A sample of 800 items produced on a new machine showed that 48 of them are defective. The factory will get rid the machine if the data indicates that the proportion of defective items is significantly more than 5%. At a significance level of 10% does the factory get rid of the machine or not? 3. A manufacturer of electric lamps is testing a new production method that will be considered acceptable if the lamps produced by this method result in a normal population with an average life of 2,400 hours and a standard deviation equal to 300. A sample of 100 lamps produced by this method has an average life of 2,320 hours. Can the hypothesis of validity for the new manufacturing process be accepted with a risk equal to or less than 5%?
Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter8: Areas Of Polygons And Circles
Section8.1: Area And Initial Postulates
Problem 23E: A triangular corner of a store has been roped off to be used as an area for displaying Christmas...
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