Susan would like to conduct a survey of homeowners in the Meadowbrook neighborhood to get their opinions on proposed road modifications in the area. She would like to sample 50 homes using systematic sampling.
There are a total of 200 homes in the Meadowbrook neighborhood. What value of k should Susan use?A) 4
B) 10
C) 50
D) 200
Question 2
AT&T would like to test the hypothesis that the proportion of 18- to 34-year-old Americans that own a cell phone is less than the proportion of 35- to 49-year-old Americans.
A random sample of 200 18- to 34-year-old Americans found that 126 owned a smartphone. A random sample of 175 35- to 49-year-old Americans found that 119 owned a smartphone. If Population 1 is defined as 18- to 34-year-old Americans and Population 2 is defined as 35- to 49-year-old Americans, and using = 0.01, the conclusion for this hypothesis test would be that because the test statistic is ___________________ ___________________ ___________________ ______.A) less than the critical value, AT&T can conclude that the proportion of 18- to 34-year-old Americans that own a cell phone is less than the proportion of 35- to 49-year-old Americans
B) less than the critical value, AT&T cannot conclude that the proportion of 18- to 34-year-old Americans that own a cell phone is less than the proportion of 35- to 49-year-old Americans
C) more than the critical value, AT&T can conclude that the proportion of 18- to 34-year-old Americans that own a cell phone is less than the proportion of 35- to 49-year-old Americans
D) more than the critical value, AT&T cannot conclude that the proportion of 18- to 34-year-old Americans that own a cell phone is less than the proportion of 35- to 49-year-old Americans
Red-eyed vireos, Vireo olivaceus, counted along census routes of the Breeding Bird Survey
New results from NASA's NEOWISE survey
black-eyed susan (2)
Superclusters in Our Neighborhood
National Sleep Foundation Survey Results
Susan Moller Okin (1946–2004).