The owner of Kat Motel wants to develop a time standard for the task of cleaning a cat cage. In a preliminary study, she observed one of her workers perform this task six times, with the following results:

How many observations should be made if she wants to be 95.44 percent confident that the maximum error in the observed time is 2 seconds? Assume that the standard deviation of the task time is 6 seconds.
A)5
B)6
C)30
D)36
E)49

Question

The owner of Kat Motel wants to develop a time standard for the task of cleaning a cat cage. In a preliminary study, she observed one of her workers perform this task six times, with the following results:

How many observations should be made if she wants to be 95.44 percent confident that the maximum error in the observed time is 2 seconds? Assume that the standard deviation of the task time is 6 seconds.
A)5 
B)6 
C)30 
D)36 
E)49

Quizplus · Accepted Answer

The Answer of The owner of Kat Motel wants to develop a time standard for the task of cleaning a cat cage. In a preliminary study, she observed one of her workers perform this task six times, with the following results:

How many observations should be made if she wants to be 95.44 percent confident that the maximum error in the observed time is 2 seconds? Assume that the standard deviation of the task time is 6 seconds.
A)5 
B)6 
C)30 
D)36 
E)49

The Owner of Kat Motel Wants to Develop a Time