Question

8 R 1 9 12 nation The time X that it takes someone to complete a crossword puzzle follows a normal distribution with mean 800 seconds. It is known that approximately 95% of people complete the puzzle in between 440 and 1160 seconds. The approximate value of the standard deviation of the distribution of X is: 180 seconds 240 seconds 120 seconds 720 seconds 360 seconds

Name: 8 r 1 9 12 nation the time x that it takes someone to complete a crossword puzzle follows a normal distribution with mean 800 seconds it is known that approximately 95 of people complete the 16304
Uploaded: 2022-05-07T05:35:38-08:00
Duration: 4 min 26 s
Channel: Aarti Kumari
Description: 8 r 1 9 12 nation the time x that it takes someone to complete a crossword puzzle follows a normal distribution with mean 800 seconds it is known that approximately 95 of people complete the 16304

          8 R 1 9 12 nation The time X that it takes someone to complete a crossword puzzle follows a normal distribution with mean 800 seconds. It is known that approximately 95% of people complete the puzzle in between 440 and 1160 seconds. The approximate value of the standard deviation of the distribution of X is: 180 seconds 240 seconds 120 seconds 720 seconds 360 seconds

Added by Dylan C.

Psychology Openstax

Rosie M. Spielman 1st Edition

Instant Answer

Solved by Expert Aarti Kumari

05/07/2022

Step 1

Step 1: We know that the mean of the normal distribution is 800 seconds. Show more…

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8 R 1 9 12 nation The time X that it takes someone to complete a crossword puzzle follows a normal distribution with mean 800 seconds. It is known that approximately 95% of people complete the puzzle in between 440 and 1160 seconds. The approximate value of the standard deviation of the distribution of X is: 180 seconds 240 seconds 120 seconds 720 seconds 360 seconds