Question 1
A random sample of 120 college seniors found that 30% of them had been offered jobs. What is the standard error of the sample proportion?
◦ 0.458
◦ 0.046
◦ 0.028
◦ 0.082
◦ 0.042
Question 2
Investigators at an agricultural research facility randomly assigned equal numbers of chickens to be housed in two rooms. In one room a group of chickens experienced normal day/night cycles, while in the other room lights were left on 24 hours a day to see if those chickens would lay more eggs. After collecting data for several days the researchers tested the hypothesis H
0:
μ1 -
μ2 = 0 against the one-tail alternative and found P = 0.22. Which is true?
◦ There's a 22% chance that chickens housed in a lighted room produce more eggs.
◦ None of these
◦ There's a 22% chance that there's really no difference in egg production.
◦ There's a 22% chance another experiment will give these same results.
◦ The chickens in the lighted room averaged 0.22 more eggs per day
Some organisms used as models in genetic research
Research Methods
Research Methods
Pyramids of energy, biomass, and numbers
Research Design in Clinical Psychology
Tracing numbers and alphabets by nat 3 years old