Sath 120-02 SGCS teeree?williams mework: 7.2 Interactive Assignment 19% (0.75 po

Question

Sath 120-02 SGCS teeree?williams mework: 7.2 Interactive Assignment 19% (0.75 points out of 4) Save bjective 1 Objective 2 Objective 2: Find the Value of a Normal Random Variable 7.2 Applications of the Normal Dist 7.2.47b 0 of 1 Point Question Help * The mean incubation time of make up the middle 97%. fertilized eggs is 20 days. Suppose the incubation tion times are approximately normally distributed with a standard deviation of 1 day Determine the incubation appro Click the icon to view a table of areas under the normal curve. The incubation times that make up the middle 97% are?to?days. Round to the nearest whole number as needed. Use ascending order.) Enter your answer in the edit fields and then click Check Answer Clear All 1014 AM 6/14/2018 O Type here to search

Explanation / Answer

1-0.97=0.03

0.03/2=0.015

invnorm(0.015)=-2.17

the z value with right tail of 0.985=2.17

z=x-mean/sd

x=z*sd+mean

lower limit=-2.17*1+20=17.83=18(round to nearest integer)

upper limit=2.17*1+20=22.17=22(round to nearest integer)

incubation times taht make up middle 97% are 18 to 22 days

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