Question

In: Statistics and Probability

A social researcher wants to test the hypothesis that college students may experience different levels of...

A social researcher wants to test the hypothesis that college students may experience different levels of happiness depending on how much they are using social media. She surveyed students about the frequency of their social media use and their happiness. Among 10 heavy users, she found an average happiness score of 4.4 with a variance of 4.3, whereas the 10 light users reported an average happiness score of 6.5 with a variance of 3.4.

heavy light
4 6
6 6
8 8
2 7
7 5
4 6
3 9
5 6
2 9
3 3

Answer the following questions:

1. What is the null hypothesis? (1 point)

2. What is the research hypothesis? (1 point)

3. What is the dependent variable? (1 point)

4. Write out the results of an independent samples t-test using these data. In other words, provide the numerical answers: t-statistic, your critical value of t (or p-value), and degrees of freedom. (4 points)

5. Write a paragraph to explain the results of the hypothesis test using statistics from the problem with alpha=0.05. This should be two or more formal sentences to describe your findings and conclusions. (3 points)

Solutions

Expert Solution

As we can see that calculated |t| is greater than critical t so reject null hypothesis.

So from this test we conclude that the average happiness is not same in both groups.So amount of use of social media is certainly affecting the happiness.

Please upvote If I am able to help you.

Thanks


Related Solutions

A social researcher wants to test the hypothesis that college students may experience different levels of...
A social researcher wants to test the hypothesis that college students may experience different levels of happiness depending on how much they are using social media. She surveyed students about the frequency of their social media use and their happiness. Among 10 heavy users, she found an average happiness score of 4.4 with a variance of 4.3, whereas the 10 light users reported an average happiness score of 6.5 with a variance of 3.4. heavy light 4 6 6 6...
A researcher wants to compare the levels of recall in younger and older subjects. Her hypothesis...
A researcher wants to compare the levels of recall in younger and older subjects. Her hypothesis is that if subjects are required to process verbal information (lists of words) older subjects do less processing and therefore will recall fewer words. The following data are from a group of older subjects and a group of younger subjects who were told to memorize the words presented to them so they could be recalled at a later time. The dependent variable is the...
A researcher wants to test the hypothesis that increasing temperature and physical exercise increases the body’s...
A researcher wants to test the hypothesis that increasing temperature and physical exercise increases the body’s skin conductivity (as measured by a galvanometer). A sample of 24 males, all 21 years old is randomly selected, and the subjects are randomly assigned to four treatment conditions. Group A is subjected to high temperature and physical exercise (jogging in place for 10 minutes). Their GSR (Galvanic skin response) scores in decivolts are 9, 8, 8, 10, 7, and 8. Group B is...
The average IQ in America is 100. A researcher wants to test the hypothesis that left-handed...
The average IQ in America is 100. A researcher wants to test the hypothesis that left-handed individuals have different IQs than the average American. He administers an IQ test to 8 left-handed individuals. They have mean 97.4 with a standard deviation of 13. Test the hypothesis (=.05) that left handed individuals have different IQs than the average Ameican. BE SURE TO ANSWER ALL PARTS OF THE QUESTION AND SHOW YOUR WORK WHEN YOU CAN. a) What is the appropriate test?...
A researcher wanted to test the effectiveness of three different doses of medication on depression levels,...
A researcher wanted to test the effectiveness of three different doses of medication on depression levels, so she recruited 60 people and split them evenly into the 3 groups. Below an ANOVA summary table from his hypothetical experiment. Use this table to answer questions below. Source SS df MS F Between   (A) (C) (F) 3.50 Within 570 (D) (G) Total (B) (E) Using the information in the table (be sure to fill in, see other ANOVA table based essay question),...
A researcher wants to test if the mean G.P.A. of CC students transferring to Sac State...
A researcher wants to test if the mean G.P.A. of CC students transferring to Sac State is above 3.3. She randomly samples 25 CC students and finds that their average G.P.A. is 3.45. Assuming that the standard deviation of G.P.A.’s is 0.5, what can the researcher conclude at the 5% significance level?
Suppose a researcher wants to perform an hypothesis test to decide whether the mean systolic blood...
Suppose a researcher wants to perform an hypothesis test to decide whether the mean systolic blood pressure for adults aged 20-29 is lower than the mean systolic blood pressure for adults aged 30-39. State the null and alternative hypothesis for the hypothesis test. Discuss the basic strategy for performing this hypothesis test, based on independent samples.
Scenario 1: A researcher wants to determine if different forms of regular exercise alter HDL levels...
Scenario 1: A researcher wants to determine if different forms of regular exercise alter HDL levels in obese middle aged males between the ages of 35 and 45.  Participants in the study are randomly assigned to one of four exercise groups – No Exercise, Resistance Training, Aerobic Exercise or Stretching/Yoga – and instructed to follow the program for 8 weeks.  Their HDL levels are measured after 8 weeks and are summarized below. Exercise Group N Mean Std Dev No exercise (TV watching...
Complete a 6-step hypothesis test using the following scenario: Students at a college are randomly selected...
Complete a 6-step hypothesis test using the following scenario: Students at a college are randomly selected 217 student cars and they found that they had ages with a mean of 7.89 years and a standard deviation of 3.67 years. They also randomly selected 152 faculty cars and found that they had ages with a mean of 5.99 years and a standard deviation of 3.65 years. Using a 0.05 significance level, is there sufficient evidence to support the claim that student...
If you are a researcher and the purpose of the hypothesis test is to prove that...
If you are a researcher and the purpose of the hypothesis test is to prove that your findings are an improvement over the status quo, the condition that you are attempting to prove is assigned to the null hypothesis. A) True B) False please give an explanation on why its false and what the correct response should be
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT