Question

A political scientist hypothesize that a political ad will increase attitudes about a particular issue. The...

A political scientist hypothesize that a political ad will increase attitudes about a particular issue. The scientist randomly asks 21 individuals walking by to see the ad and then take a quiz on the issue. The general public that knows little to nothing about the issue, on average, scores 50 on the quiz. The individuals that saw the ad scored an average of 51.8 with a variance of 29.05. What can the political scientist conclude with α = 0.05?

a) What is the appropriate test statistic
one-sample t-test

independent-samples t-test

related-samples t-test

If appropriate, compute the CI. If not appropriate, input "na" for both spaces below.
[   ,   ]

Compute the corresponding effect size

r2 =   ;   ---Select--- \ trivial effect small effect medium effect large effect

Homework Answers

Answer #1

a) The appropriate test statistic - one-sample t-test

e) The effect size is

, small effect.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A political scientist hypothesizes that a political ad will reduce attitudes about a particular issue. The...
A political scientist hypothesizes that a political ad will reduce attitudes about a particular issue. The scientist randomly asks 31 individuals walking by to see the ad and then take a quiz on the issue. The general public that knows little to nothing about the issue, on average, scores 50 on the quiz. The individuals that saw the ad scored an average of 53.59 with a variance of 25.70. What can the political scientist conclude with an α of 0.05?...
A school psychologist believes that a popular new hypnosis technique increases depression. The psychologist collects a...
A school psychologist believes that a popular new hypnosis technique increases depression. The psychologist collects a sample of 23 students and gives them the hypnosis once a week for two months. Afterwards the students fill out a depression inventory in which their average score was 49.21. Normal individuals in the population have a depression inventory average of 49 with a variance of 121.00. What can the psychologist conclude with an α of 0.01? a) What is the appropriate test statistic?...
Researchers hypothesize that a new oral contraceptive will produce weight loss. In a study, healthy females...
Researchers hypothesize that a new oral contraceptive will produce weight loss. In a study, healthy females were weighed (lb) at the beginning of a course of the new oral contraceptive. They were reweighed at 2 months. What can the researchers conclude with an α of 0.01? The data are below. initial weight 2-month weight 140 141 137 130 140 158 147 145 148 140 150 119 144 141 144 163 146 145 151 144 a) What is the appropriate test...
Researchers hypothesize that a new oral contraceptive will produce weight gain. In a study, healthy females...
Researchers hypothesize that a new oral contraceptive will produce weight gain. In a study, healthy females were weighed (lb) at the beginning of a course of the new oral contraceptive. They were reweighed at 3 months. What can the researchers conclude with an α of 0.01? The data are below. initial weight 3-month weight 140 117 137 130 140 158 147 145 141 140 150 119 144 141 144 163 146 145 151 144 a) What is the appropriate test...
A national organization ran an advertising campaign designed to convince people to quit smoking. To evaluate...
A national organization ran an advertising campaign designed to convince people to quit smoking. To evaluate their campaign, they had subjects record the average number of cigarettes smoked per day in the week before and one week after exposure to the ad. What can be concluded with α = 0.05. The data are below. before after 35 17 12 29 18 19 27 26 16 41 46 17 21 34 31 20 34 26 27 41 a) What is the...
A sociologist wants to know about the stress levels in the nation over the past years....
A sociologist wants to know about the stress levels in the nation over the past years. In the late 1990s, the average score on the Brown's Stress Inventory (BSI) in the nation was 18 with a variance of 51.84. A current day sample of 21 produces a mean BSI score of 18.5. What can the sociologist concludes with an α of 0.01? a) What is the appropriate test statistic? ---Select--- na z-test one-sample t-test independent-samples t-test related-samples t-test b) Population:...
A sociologist wants to know about the stress levels in the nation over the past years....
A sociologist wants to know about the stress levels in the nation over the past years. In the late 1990s, the average score on the Brown's Stress Inventory (BSI) in the nation was 18 with a variance of 51.84. A current day sample of 21 produces a mean BSI score of 18.5. What can the sociologist concludes with an α of 0.01? a) What is the appropriate test statistic? ---Select--- na z-test one-sample t-test independent-samples t-test related-samples t-test b) Population:...
A cigarette company rand an advertising campaign designed to improve sales. To evaluate their campaign, they...
A cigarette company rand an advertising campaign designed to improve sales. To evaluate their campaign, they had subjects record the average number of cigarettes smoked per day in the week before and the week after exposure to the ad. What can be concluded with an α of 0.05. The data are below. before after 46 25 21 34 31 20 34 26 27 41 35 17 12 29 18 19 27 26 16 41 a) What is the appropriate test...
A national organization ran an advertising campaign designed to convince people to quit smoking. To evaluate...
A national organization ran an advertising campaign designed to convince people to quit smoking. To evaluate their campaign, they had subjects record the average number of cigarettes smoked per day in the week before and three weeks after exposure to the ad. What can be concluded with α = 0.05. The data are below. before after 46 17 21 34 31 20 34 26 27 41 35 17 12 29 29 19 27 26 16 41 a) What is the...
, "Opening up" is thought to improve individuals' mood following a tragic incident. A health psychologist...
, "Opening up" is thought to improve individuals' mood following a tragic incident. A health psychologist is interested in its effect on HIV positive patients. The psychologist collected a sample of 17 HIV positive patients and asked them to talk about their HIV related issues ("open up") with their family. The psychologist assessed the patients' level of hopefulness afterwards and obtained a mean of 114.58 with a standard deviation of 4.92. The average hopefulness of HIV positive individuals is known...