EB
Emily Bodie
Answers (5)
EB
Answered
The outcome variable in the regression analysis is the ______.
A) dependent variable
B) independent variable
C) mediating variable
D) intervening variable
A) dependent variable
B) independent variable
C) mediating variable
D) intervening variable
On Jul 28, 2024
A
EB
Answered
Explain the basic concept of random sampling, with examples of how you might do random sampling for a research project that interests you.
On Jun 29, 2024
The answer will include student examples, but needs to include the fact that random sampling is a type of probability sampling. Examples of random sampling include throwing dice, drawing names out of a hat, and lotteries. Random sampling removes the researcher as the agent of selection and replaces him or her with "luck of the draw."
EB
Answered
In a random sample of 400 residents of Chattanooga, 320 residents indicated that they voted for the Democratic candidate in the last presidential election.Develop a 95% confidence interval estimate for the proportion of all Chattanooga residents who voted for the Democratic candidate.
On Jun 28, 2024
.7608 to .8392
EB
Answered
The average gasoline price of one of the major oil companies has been $2.20 per gallon.Because of cost reduction measures, it is believed that there has been a significant reduction in the average price.In order to test this belief, we randomly selected a sample of 36 of the company's gas stations and determined that the average price for the stations in the sample was $2.14.Assume that the standard deviation of the population (σ) is $0.12.
a.
State the null and the alternative hypotheses.
b.
Compute the test statistic.
c.
What is the p-value associated with the above sample results?
d.
Using α = .05, test the company's claim.
a.
State the null and the alternative hypotheses.
b.
Compute the test statistic.
c.
What is the p-value associated with the above sample results?
d.
Using α = .05, test the company's claim.
On May 30, 2024
a.
H0: μ
$2.20
Ha: μ < $2.20
b.
z = -3
c.
p-value = almost zero (.0013)
d.
p-value < .05; reject H0; the average price has been reduced.
a.
H0: μ
$2.20Ha: μ < $2.20
b.
z = -3
c.
p-value = almost zero (.0013)
d.
p-value < .05; reject H0; the average price has been reduced.