This lab is on single sample t-test. This is ALL the relevant information given, including the data needed for the lab which is referred in the worksheet as "class data". THERE IS NO MISSING INFORMATION. The questions are answered using the program Jamovi (free public program), which i put down bellow to download. The worksheet has questions and steps that you answer using the program (you don't submit nothing on the program, you are simply using it to answer questions from the worksheet).

This is a link you can use to download the program

https://www.jamovi.org/

Here is the worksheet.

Lab Analysis Report #5: Single-Sample t-test Instructions: You will complete this lab report using Jamovi statistical software package. The data are in google sheet . 1. An assumption of the t-test is that your sample was obtained randomly, however, for the questions in this lab, we are going to be using your data -- data from students enrolled in Drew's COGS 148 class. If we actually wanted to draw conclusions about the UCSD population more generally, what would be a better way to collect this data? Briefly describe how you might collect this data. Now, with that out of the way, we are going to pretend we took a random sample, perhaps in the the way you described above. 2. Members of Gen Z (those born between late 90s and early 2010s), on average received their first smartphone when they were 10.3 years old. According to our class data, do we have evidence that UCSD students are different from Gen Z in the U.S. population more generally? a. What is the null hypothesis? b. What is the alternative hypothesis? C. Using smartphone data conduct the appropriate type of t-test in JAMOVI to see if there is evidence for her hypothesis. Paste an image of the table output below. d. Should we retain or reject the null hypothesis? Assume an alpha of .05.e. Write a sentence as it would appear in the results section of a journal article describing the outcome of your statistical test. f. given the outcome of your statistical test, what type of error is possible? 3. In a Gallup Poll conducted in Fall 2020 Americans were asked "How worried are you that you will get coronavirus?" On a scale of 1 (Very worried) to 4 (Not at all worried), and the average response was 2.6 (assume this is an actual population parameter even though it is just a very large sample). According to our class data (which we'll assume is a random sample from the American population), do we have evidence that people now feel differently from then the population felt two years ago? a. What is the null hypothesis? b. What is the alternative hypothesis? c. Using Worried data conduct the appropriate type of t-test in JAMOVI to see if there is evidence for her hypothesis. Paste an image of the table output below. d. Should we retain or reject the null hypothesis? e. Write a sentence as it would appear in the results section of a journal article describing the outcome of your statistical test.f. given the outcome of your statistical test, what type of error is possible? 4. According to a statistic released by Instagrams this year, the average instagram account owner has 150 followers. Do we have evidence that UCSD students are more or less popular on twitter than the population average? a. What is the null hypothesis? b. What is the alternative hypothesis? c. Using InstaFollower data conduct the appropriate type of t-test in JAMOVI to see if there is evidence for this hypothesis. Paste an image of the table output below. d. Should we retain or reject the null hypothesis? e. Write a sentence as it would appear in the results section of a journal article describing the outcome of your statistical test. f. given the outcome of your statistical test, what type of error is possible