Question

1. Use the following information to answer questions 1-3.

   A toy manufacturer wants to see how long, on average, a new toy captures children’s attention. He tests 49 children, selected at random, and finds that their mean attention span is 23 minutes with a standard deviation of seven minutes. If we assume that attention spans are normally distributed, compute the following:

   With a 95% level of confidence, compute the margin of error for the mean attention span of children playing with this new toy.

   	a.	37.2
   	b.	2.01
   	c.	1.96

1 points   

QUESTION 2

1. Compute the 95% confidence interval for the mean attention span of children playing with this new toy.

   	a.	9.01, 4.99
   	b.	21.04, 24.96
   	c.	20.99, 25.01

Answer 1