Formulate hypotheses that could be used to determine

Reference no: EM13645628

According to the Pew Internet & American Life Project, 75% of American adults use the Internet. The Pew project authors also reported on the percentage of Americans who use the Internet by age group. The data in the file AgeGroup are consistent with their findings. These data were obtained from a sample of 100 Internet users in the 30-49 age group and 200 Internet users in the 50-64 age group. A Yes indicates the survey respondent had used the Internet; a No indicates the survey respondent had not. 85 users in the 30-49 age group say yes while 144 users in the 50-64 age group say yes.

a. Formulate hypotheses that could be used to determine whether the percentage of Internet users in the two age groups differs from the overall average of 75%.

b. Estimate the proportion of Internet users in the 30-49 age group. Does this proportion differ significantly from the overall proportion of 0.75? What is your conclusion? Use and the p-value approach.

c. Estimate the proportion of Internet users in the 50-64 age group. Does this proportion differ significantly from the overall proportion of 0.75? What is your conclusion? Use and the p-value approach.

d. Would you expect the proportion of users in the 18-29 age group to be larger or smaller than the proportion for the 30-49 age group? Support your conclusion with the results obtained in parts (b) and (c).

Reference no: EM13645628

Questions Cloud

141 kg steel part whose temperature is 1000oc is dropped : 1.41 kg steel part whose temperature is 1000oc is dropped into an open insulated vat containing 35.4 kg of water whose

A manufacturer has designed a process to produce pipes that : a manufacturer has designed a process to produce pipes that are 10 feet long. the distribution of the pipe length

Assuming the friction force is constant determine how much : a 7.80-g bullet moving at 480 ms penetrates a tree trunk to a depth of 6.5 cm.a use work and energy considerations to

What is the net work done on the particle by external : a 0.800-kg particle has a speed of 1.30 ms at point a and kinetic energy of 8.00 j at point b.a what is its kinetic

Formulate hypotheses that could be used to determine : according to the pew internet amp american life project 75 of american adults use the internet. the pew project authors

A raindrop of mass 30610e5 kg falls vertically at constant : a raindrop of mass 3.0610e5 kg falls vertically at constant speed under the influence of gravity and air resistance.

A peripheral milling operation is performed on the top of a : a peripheral milling operation is performed on the top of a rectangular workpiece that is 650 mm long 50 mm wide and

A skydiver of mass 830 kg jumps from a slow-moving aircraft : a skydiver of mass 83.0 kg jumps from a slow-moving aircraft and reaches a terminal speed of 54.9 ms.a what is her

The water is heated to 160degc at constant volume and is : a piston-cylinder assembly contains 5 kg of a two-phase liquid-vapor mixture of water having 32 quality is initially at

User Account

All Pages