This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Doctors at a technology research facility randomly assigned equal numbers of people to use computer ... (Read 292 times)

Mr. Wonderful

  • Hero Member
  • *****
  • Posts: 866
on: Aug 30, 2019

Question 1

A random sample of 120 classrooms at a large university found that 70% of them had been cleaned properly. What is the standard error of the sample proportion?
◦ 0.042
◦ 0.082
◦ 0.028
◦ 0.046
◦ 0.458

Question 2

Doctors at a technology research facility randomly assigned equal numbers of people to use computer keyboards in two rooms. In one room a group of people typed a manuscript using standard keyboards, while in the other room people typed the same manuscript using ergonomic keyboards to see if those people could type more words per minute. After collecting data for several days the researchers tested the hypothesis H0: μ1 - μ2 = 0 against the one-tail alternative and found a P-value of 0.22. Which is true?
◦ There's a 22% chance another experiment will give these same results.
◦ There's a 22% chance that people using ergonomic keyboards type more words per minute.
◦ None of these.
◦ There's a 22% chance that there's really no difference in typing speed.
◦ The people using ergonomic keyboards type 22% more words per minute.
Stats: Modeling the World ¦ Bock, Velleman, De Veaux ¦ 4th Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by Mr. Wonderful on Aug 30, 2019

aloop

  • Sr. Member
  • ****
  • Posts: 315
Reply #1 on: Aug 30, 2019
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 45% of students answer this correctly


Mr. Wonderful

  • Hero Member
  • *****
  • Posts: 866
Reply #2 on: Aug 30, 2019
Excellent


aloop

  • Sr. Member
  • ****
  • Posts: 315
Reply #3 on: Aug 30, 2019
Great! Please up vote :D


« previous next »
 

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Did you know?

Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

The nitrogen cycle. Numbers represent fluxes as 1012 g N per year (data from Schlesinger 1991, after The nitrogen cycle. Numbers represent fluxes as 1012 g N per year (data from Schlesinger 1991, after
Wall painting with giraffes, zebra, eland, and abstract shapes, San people, Inanke Cave, Matobo ... Wall painting with giraffes, zebra, eland, and abstract shapes, San people, Inanke Cave, Matobo ...
Components of a computer system. Components of a computer system.
Of four outcomes people can have after exposure to trauma, the most prevalent is resilience. Others, ... Of four outcomes people can have after exposure to trauma, the most prevalent is resilience. Others, ...
Overview of a computer-controlled high-pressure common rail V-8 diesel engine. Overview of a computer-controlled high-pressure common rail V-8 diesel engine.
The initial timing is where the spark plug fires at idle speed. The computer then advances the ... The initial timing is where the spark plug fires at idle speed. The computer then advances the ...
Video: Brain Lobes Animation

For a complete list of videos, visit our video library