I need help with 8 statistics problems, it also requires to use jamovi.

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This is an assignment of statistics and it is due on 4th June 2020, 11:59 pm EDT. All the instructions are given in the assignment and the file is in the format of Word. Also, this requires the use of jamovi (a statistics output program).

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Additional Instructions:
ASSIGNMENT#1: INSTRUCTIONS Name & Student Number: PART#1: Complete the following questions: 1. Explain why the formula for the sample variance and the population variance are not the same. (1 mark) 2. The information for two workers on the same job over a long period of time is summarized in the table below. Which worker appears to be more consistent in the time they take to complete the job. Please explain. (1 mark) Worker A Worker B Mean time to complete job (minutes) 30 25 Standard deviation (minutes) 6 4 3. What if someone told you that there is little variability in the scores for one of their variables. How would you describe the shape of the distribution of scores? (1 mark) 4. On an exam you obtain a score of X = 80. If the instructor for the course provided descriptive statistics (M, SD) for the distribution of exam scores, which result would you prefer: (a) M = 76, SD = 2 or (b) M = 76, SD = 8. Please explain your choice. (1 mark) PART#2: Data analysis with jamovi and reporting (16 marks) 1. Present a description of your variables: Provide a codebook with the following elements: Variable name; Variable label; Value & Value label and Measurement scale. Please present this as a table. This should fit on one page. 2. Examine your data using jamovi: Produce appropriate descriptive statistics and graphics – examples of these are measures of central tendency and variability, frequency tables, histograms, and bar charts. Variables should be examined for overall data and broken down by specific groupings or characteristics of the data, where appropriate. 3. Interpret your results: Provide a written interpretation or summary of your findings from part 2 above. This can be no longer than one-page and should not include any tables or graphs. Please ensure you provide enough information/description so that someone who has not seen your data can understand. Please use complete sentences and no bullet points. 4. Output from jamovi: Provide the output from jamovi. You can copy/paste this directly into your submission file (see below for details about how to submit your assignment). Description of Data This data set contains the achievement test (English as a Second Language) results and some background data collected during experimental trial of a new ESL program. The study was one year in duration. Students were allocated to the experimental ESL program class and a regular program control class on a random basis. Vocabulary and grammar tests were administered to the students in both groups at the beginning and the end of the school year. Data can be found in the excel file: ESLprogram.xlsx Variables The dataset includes 24 cases and 7 variables: · Student ID · Group (1 - experimental, 2 - control, 9 - missing) · Gender (1 - male, 2 - female, 9 - missing) · Pre-test vocabulary scores (scores range from 0 - 25, 99 - missing) · Pre-test grammar scores (scores range from 0 - 25, 99 - missing) · Post-test vocabulary scores (scores range from 0 - 25, 99 - missing) · Post-test grammar scores (scores range from 0 - 25, 99 - missing) Here is what you submit to Moodle: · A Microsoft Word or pdf document with the following: · Your written response to PART#1 · Your response to PART#2 that includes your code book, interpretation, and the output from jamovi. This means PART 2 of the assignment will have three headings: Codebook; Summary of Findings; and jamovi Output. Please include your full name in the file name of your Microsoft Word or pdf document, for example, Assignment#1_<include full name here>. Please upload your completed assignment by going to Assignment#1 under the Assignment Instructions and Submission folder in Moodle.
Sheet1 Student ID Group Gender PreVocab PreGrammar PostVocab PostGrammar 1 1 1 14 15 18 18 1 1 2 12 11 19 19 5 1 2 13 14 19 18 6 1 1 9 8 17 16 7 1 2 10 13 18 17 8 1 2 12 15 19 18 10 1 2 8 10 17 17 11 1 1 10 12 18 19 13 1 1 13 9 99 17 14 1 2 11 12 19 19 15 1 1 13 14 18 20 17 1 2 17 14 20 18 18 2 2 12 13 18 19 20 2 2 12 10 14 13 21 2 1 10 11 15 15 22 2 2 14 16 19 19 28 2 2 11 12 16 15 33 2 1 12 13 17 99 34 2 1 13 14 19 18 38 2 1 12 11 16 16 40 2 2 11 9 16 17 41 2 2 14 13 18 19 42 2 1 17 18 20 20 43 2 1 11 13 15 14

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