As part of a study on how people of different ages use mobile technology, each person in a sample of 258 cell phone users age 20 to 39 was asked if they use their cell phones to stay connected while they are in bed. The same question was also asked of each person in a sample of 129 cell phone users age 40 to 49. In the 20 to 39 years age group, 168 people indicated that they do stay connected while they are in bed, whilst in the 40 to 49 years old age group, 61 people stay connected while in bed.Let: ??̂ 1 = Proportion of cell phone users age 20 to 39 who stay connected while they are in bed ??̂ 2 = Proportion of cell phone users age 40 to 49 who stay connected while they are in bed ??̂= Pooled proportion of cell phone users who stay connected while they are in bed
As part of a study on how people of different ages use mobile technology, each person in a
sample of 258 cell phone users age 20 to 39 was asked if they use their cell phones to stay
connected while they are in bed. The same question was also asked of each person in a sample
of 129 cell phone users age 40 to 49. In the 20 to 39 years age group, 168 people indicated that
they do stay connected while they are in bed, whilst in the 40 to 49 years old age group, 61
people stay connected while in bed.Let:
??̂
1 = Proportion of cell phone users age 20 to 39 who stay connected while they are in bed
??̂
2 = Proportion of cell phone users age 40 to 49 who stay connected while they are in bed
??̂= Pooled proportion of cell phone users who stay connected while they are in bed
Given that
n1 = 258 , X1 = 168 , n2 = 129 , X2 = 61
Step by step
Solved in 2 steps with 1 images
