Question

Use the following data to answer the items.

American Time Use, Homework and Research

Series Title:	Avg hrs per day for participants - Homework and research, 18 yrs and over
Type of estimate:	Average hours per day for participants in an activity
Activity:	Homework and research
Type of Days:	All days
Age Group:	18 years and over
Years:	2008 to 2018

 

Year	Period	Estimate	Standard Error
2008	Annual	3.32	0.244
2009	Annual	3.39	0.193
2010	Annual	3.03	0.150
2011	Annual	3.21	0.185
2012	Annual	3.09	0.136
2013	Annual	3.68	0.256
2014	Annual	3.07	0.191
2015	Annual	3.61	0.233
2016	Annual	3.28	0.181
2017	Annual	3.39	0.191
2018	Annual	3.32	0.196

 

**When entering your answers, round all numbers to four decimal places.**

We can be 70% confident that for 2018, the estimated hours of homework and research for Americans 18 years and older who engaged in those activities is between

 hours (lower limit) and  hours (upper limit).

We can be 95% confident that for 2018, the estimated hours of homework and research for Americans 18 years and older who engaged in those activities is between

 hours (lower limit) and  hours (upper limit).

. (True/False). There is more variability in American’s homework and research time in 2008 than in 2018.

. (True/False). The year 2013 had the highest variability in homework and research time.

Suppose recent research found that people who do homework or research for 3.75 or more hours per day spend more money on coffee. Major coffee chain Moonbucks would like to know, with 95% certainty, if, in 2018, average Americans who do these activities spend 3.75 or more hours each day doing them, and if so, Moonbucks would like to do a marketing campaign to better reach these consumers. Should Moonbucksdo the marketing campaign?  (Yes/No).