Question 1
A confidence interval for (
μ1 -
μ2) is (5, 8). Which of the following inferences is correct?
◦
μ1 <
μ2◦ no significant difference between means
◦
μ1 >
μ2◦
μ1 =
μ2Question 2
In a controlled laboratory environment, a random sample of 10 adults and a random sample of 10 children were tested by a psychologist to determine the room temperature that each person finds most comfortable. The data are summarized below:
Suppose that the psychologist decides to construct a 99% confidence interval for the difference in mean comfortable room temperatures instead of proceeding with a test of hypothesis. The 99% confidence interval turns out to be (-2.9, 3.1). Select the correct statement.
◦ It cannot be concluded at the 99% confidence level that there is actually a difference between the true mean comfortable room temperatures for the two groups.
◦ It can be concluded at the 99% confidence level that the true mean room temperature for adults exceeds that for children.
◦ It can be concluded at the 99% confidence level that the true mean comfortable room temperature is between -2.9 and 3.1.
◦ It can be concluded at the 99% confidence level that the true mean comfortable room temperature for children exceeds that for adults.
The form and orientation of desert plants reduces heat gain from the environment and facilitates coo
A Controlled Cross between Two Plants
Schedule for Controlled Substances
Sample composition of maternal and paternal HLA haplotypes.
A sample of work by a Grade 4 student with a specific learning disorder