A variable is normally distributed with mean 4 and standard deviation 2. a. Q1=_____ Q2=______ Q3=_______ ​(Round to two decimal places as​ needed.) b. The 90th percentile is __________. ​(Round to...


A variable is normally distributed with mean 4 and standard deviation 2.



a. Q1=_____   Q2=______   Q3=_______

​(Round to two decimal places as​ needed.)


b. The 90th percentile is __________.
​(Round to two decimal places as​ needed.)


Choose the correct answer below.

A. The 90th percentile is the number that divides the bottom 90​%



of the data from the top 10​% of the data.




B. The 90th percentile is the number that divides the bottom 10​%


of the data from the top 90​% of the data.




C. The 90th percentile is the number that occurs in the data 90​% of the time.




D. The 90th percentile is the number that is 90​% of the largest data value.



c. The value that​ 65% of all possible values of the variable exceed is __________.

​(Round to two decimal places as​ needed.)


d. The two values that divide the area under the corresponding normal curve into a middle area of 0.95 and two outside areas of 0.025 are _______ and ________.

​(Round to two decimal places as needed. Use ascending​ order.)

These values enclose the area of the normal curve that is within _________ standard deviations.

​(Round to the nearest integer as​ needed.)







Jun 02, 2022
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