math math math i need help! PLZ

Mathematics
Tutor: None Selected Time limit: 1 Day

In a recent study of animal sleep times at the zoo, the mean amount of sleep per night is 6.3 hours with a standard deviation of 2.1. If 23 animals are selected, find the probability that the mean sleep time per night is greater than 8 hours.

May 23rd, 2015


z= (8-6.3)/ 2.1

z= 0.8

probability that the mean sleep time per night is greater than 8 hours is 0.8

May 23rd, 2015

A0.2981
B0.3207
C0.0103
D0.0001
the choices I was given.

May 23rd, 2015

then its surely B)...................................

May 23rd, 2015

Studypool's Notebank makes it easy to buy and sell old notes, study guides, reviews, etc.
Click to visit
The Notebank
...
May 23rd, 2015
...
May 23rd, 2015
Mar 30th, 2017
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer