Question

1. a preschool wants to decrease the crying time of infants during naptime. They try implementing a new naptime routine using a sample of 25 infants. They found their sample cried for a mean of 10.40 minutes with a standard deviation of 7.60 mintues. The average naptime crying time for the population of infants is 12.00 minutes.

   Using the data, calculate an obtained value using the correct statistical test. The value is:

   		-1.05
   		-1.17
   		1.60
   		.78

Given the value you obtained for the naptime study, what would the correct decision be?

		The routine made a significant difference in naptime crying.
		The routine did not make a significant difference in naptime crying.
		The routine significantly decreased naptime crying.
		The routine did not significantly decrease naptime crying.

Answer 1