Assume you perform a study to detect how using social networks affects people's hapiness level. You have 20 volunteers. Your study is planned as follows. All participants are known to be active users of social networks. First you ask every participant to fill in special questionary that allows you to estimate their hapiness level. After that all participants will avoid using of social networks for one week. After this week they complete similar questionary to detect their new level of hapiness. Then for each participants their new hapiness level is compared the initial one. Assume that for each participant their hapiness level is changed: either decreased or increased. Let X be the random variable that models the number of participants for who increased their happiness level. Let Xobs = 16, i.e. 16 out of 20 participants become more happy, and it's the only data you can make decision on. Your significance level is 5%.

Assume you perform a study to detect how using social networks affects people's hapiness level. You have 20 volunteers. Your study is planned as follows. All participants are known to be active users of social networks. First you ask every participant to fill in special questionary that allows you to estimate their hapiness level. After that all participants will avoid using of social networks for one week. After this week they complete similar questionary to detect their new level of hapiness. Then for each participants their new hapiness level is compared the initial one. Assume that for each participant their hapiness level is changed: either decreased or increased. Let X be the random variable that models the number of participants for who increased their happiness level. Let Xobs = 16, i.e. 16 out of 20 participants become more happy, and it's the only data you can make decision on. Your significance level is 5%.

Name: • State null hypothesis and an alternative of your research. Explain
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: • State null hypothesis and an alternative of your research. Explain why you choose this alternative.• State how X is distributed provided that null hypothesis holds.• Would you claim that people become happier when they avoid using social networks

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Suppose we measure GPA for people in our class, we find the mean is 2.8 and the median is 3.2. What can you say is most likely true about GPAs in our class?
Twelve inmates in a particular prison took part in an anger management class. Before it began, the median score on an anger control assessment of the group was 42 (out of a maximum of 60). After the six month class, the participants scores on the same assessment were 35, 41, 40, 44, 57, 36, 39, 47, 58, 39, 42, 39. 1. Construct a boxplot of the data and explain briefly why a sign test is appropriate to use in this case
Resting heart rate varies among different people. Design an experiment and examine whether or not a particular variable (e.g. fitness level, smoking, activity, age, gender) has an effect on heart rate. Begin by making one or more observations. Then formulate a hypothesis that can be tested. Finally, design an experiment to test your hypothesis! You can use yourself and any person you can talk to including family and friends Observations: State one or more observations related to your scientific Observation(s): The Heart rate will change depending on activity Hypothesis: Generate a hypothesis and include a justification for your Hypothesis: Male that are active will have a higher hear rate than females Experiment: Describe your experiment below and state the independent and dependent variables you will be exploring. Explain any specific instructions, e.g. how it will be carried out, how any measurements are to be made, if needed, etc……
HELP ME WITH THIS ONE PLEASE! NEED IT SO MUCH You are a teacher whose goal is to determine how well your class consisting of twenty-nine students performed in asummative examination. You are supposed to present the results of your study to the students in order to convince them that you have to conduct a remedial class on top of their regular class hours. You have to present your data in proper form and analyze and interpret the results using the most appropriate measures.
Please show steps clearly
A researcher gathered a sample of participants who volunteered for a studying of phobias. She measured anxiety level of participants as they viewed photos of spiders and again when they viewed puppies. Which statistical test is appropriate for this study and why?
Give me an example of a research scenario where you would use an independent samples t-test. You can set up a situation where there is an experimental group and a control group, or maybe you want to compare two other groups of people (parents and non-parents, gender, partnered and single, etc). Give us a summary of what you would want to study, who your sample participants would be, why an independent samples t-test would be the best fit, and what statistically significant results would mean. Don't forget to include your research and null hypotheses!
You are a public health researcher. You want to see if the average age that a person starts smoking has changed over time. Smokers are recruited to answer a survey that asked at what age they started smoking. You divided participants into two groups, one is participants under the age of 30 and the second for participants over the age of 30. The average age for the two groups were compared. Which statistical test would be best to determine if there is a significant different in starting age between the two groups. one-sample t-test related samples t-test independent samples t-test ANOVA
A study was done to determine if food insecurity/hunger impacts psychological distress (this is fake data to make it simple, but it is based off of a 2020 study that examined the associations between food insecurity and psychological distress among older people in Ghana). Participants were broken into three groups based on their responses: no food insecurity, moderate food insecurity, and severe food insecurity. Psychological distress was measured on the Kessler Psychological Distress Scale (K10), where scores range from 0 to 50. Enter data and test to determine if there is a significant difference between the 3 groups in psychological distress Food insecurity: Psychological distress scores (higher = more distress) No food insecurity 5 6 8 10 5 4 14 9 Moderate food insecurity 16 14 9 7 14 8 16 17 Severe food insecurity…
You are hanging out with your friend on a Saturday night and they decide they want to watch the Ultimate Fighting Championship Event happening that night. As you are watching the mixed martial arts fights you notice that males and females fight separately. You talk to your friend about this and find out that it is due to "safety and sizing" that the sexes do not fight each other. You (being a statistics enthusiast) decide to compare skills between the sexes to see if there is a true difference between the fighters' ability. You take the top 10 male fighters and the top 10 female fighters win/loss ratios (yes these I actually looked up): Male Fighters Female Fighters 19 7.3 23 2.8 21 4.2 2.8 10.5 2.4 2.8 3.2 15 4 5.3 3.9 26 3.8 4 5 3.8
8. Compute 1. Sample statistic 2. Test statistic 1. Statistical results 2. Contextual results 9. Describe
Please help me I tried multiple times, but still getting it wrong