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 figure above shows a normal distribution with mean ? an
[#permalink]
28 Aug 2020, 10:28
28 Aug 2020, 10:28
Expert Reply
00:00
Question Stats:
95% (00:46) correct
4% (00:27) wrong based on 49 sessions
Hide Show timer Statistics
Attachment:
GRE The figure above shows a normal distribution with mean.png [ 12.14 KiB | Viewed 2924 times ]
The figure above shows a normal distribution with mean m and standard deviation d, including approximate percents of the distribution in each of the six regions shown. Tina’s travel times to school last year were approximately normally distributed, with a mean of 45 minutes and a standard deviation of 3 minutes. According to the figure shown, approximately what percent of Tina’s travel times to work last year were greater than 42 minutes?
A. 84%
B. 68%
C. 48%
D. 34%
E. 28%
Re: The figure above shows a normal distribution with mean ? an
[#permalink]
28 Aug 2020, 10:28
28 Aug 2020, 10:28
Expert Reply
Post A Detailed Correct Solution For The Above Questions And Get A Kudos.
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
For more theory and practice see our GRE - Math Book
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
For more theory and practice see our GRE - Math Book
Re: The figure above shows a normal distribution with mean ? an
[#permalink]
28 Aug 2020, 11:38
28 Aug 2020, 11:38
1
Look at the graph.
Mean is 45 min.
Sd = 3 min.
So, 42 minutes is Mean - SD - and this number cuts the density into 2 pieces: 1 that lies before and holds 16% and another that lies on the right-hand side - 84%. The correct answer is 84% then
Mean is 45 min.
Sd = 3 min.
So, 42 minutes is Mean - SD - and this number cuts the density into 2 pieces: 1 that lies before and holds 16% and another that lies on the right-hand side - 84%. The correct answer is 84% then
