GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
The weights of python snakes are normally distributed with a
[#permalink]
13 Oct 2020, 06:30
13 Oct 2020, 06:30
1
Expert Reply
4
Bookmarks
00:00
Question Stats:
73% (01:27) correct
27% (01:44) wrong based on 100 sessions
Hide Show timer Statistics
The weights of python snakes are normally distributed with a mean of 110 kg and a standard deviation of 8 kg. If 68% of pythons weigh within one standard deviation of the mean and 95% of pythons weigh within two standard deviations of the mean, what percent of pythons weigh from 94 to 102 kg?
A. 47.5%
B. 34%
C. 27%
D. 17%
E. 13.5%
Kudos for the right answer and explanation
A. 47.5%
B. 34%
C. 27%
D. 17%
E. 13.5%
Kudos for the right answer and explanation
Re: The weights of python snakes are normally distributed with a
[#permalink]
14 Oct 2020, 17:57
14 Oct 2020, 17:57
2
Quote:
The weights of python snakes are normally distributed with a mean of 110 kg and a standard deviation of 8 kg. If 68% of pythons weigh within one standard deviation of the mean and 95% of pythons weigh within two standard deviations of the mean, what percent of pythons weigh from 94 to 102 kg?
Step 1: Understanding the question
Plotting normal distribution curve with a mean of 110 and standard deviation of 8, refer to the attachment
When 95% of the readings lies between 94 to 126 and 68% lie between 102 and 118, remaining region ie blue = 95% - 68% = 27%
Hence, percent between 94 to 102 = 27/2 = 13.5%
E is correct
Attachments
Untitled.png [ 8.53 KiB | Viewed 6134 times ]
Re: The weights of python snakes are normally distributed with a
[#permalink]
31 May 2021, 02:11
31 May 2021, 02:11
what level is this question
