A parent downloads an app that allows him to monitor the amount of screen time his kid is using on the phone. The kid claims that she is only using 1 hour per day on the phone on average, but the app, over the course of 47 days, finds that the kid used an average of 1.2 hours per day. The parent wants to know if the kid is using an average of 1 hour per day for all days of use.

a) The 1.2 is a/an:

• population parameter
• variable
• sample statistic
• observation

b) The sample size is:

• 1
• 47
• 1.2

c) Each day is a/an:

• sample statistic
• population parameter
• variable
• observation

d) The screen time used (in hours) for each day is a/an:

• sample statistic
• population parameter
• observation
• variable

e) All screen times used, for all days, is:

• the population
• the statistic
• the parameter
• the sample