Doctors at a technology research facility randomly assigned equal ...

[Mr. Wonderful]

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.

[aloop]

A FREE account is required to view all solutions! Click to Register

Login with Facebook Login with Google Login with Email

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]

Excellent

[aloop]

Great! Please up vote