STA10003: Foundations of Statistics - Social Science and Psychological - Report Writing Assessment Answer

Internal Code: 1AGCHD Code: STA10003

Foundations of Statistics Report Writing Assessment Answer

Assignment Task: STA10003 FOUNDATIONS OF STATISTICS ASSIGNMENT - STA10003 Scenario You are a new graduate researcher at a social science and psychological sciences research institute. You have been given a dataset which relates to a study of Australian adolescents in 2017. Year 8 students completed a survey at the beginning (time 1) and the end (time 2) of the school year. The purpose of the study was to monitor changes in the extent to which year 8 students use avoidance coping strategies and to investigate factors relating to aggression. The extent of avoidance coping was recorded at the beginning and end of the school year, with external aggression and internal aggression (hostility) also recorded at the end of the school year. Demographic data were also collected for each student, regarding their gender and birth order. Data For the purpose of your report you should use the same data set as for the Assignment [part 1]. That is, you should already have saved a random sample of 350 of the 1000 observations from the original data file STA10003AssignmentData_SP1_2019.sav You should not need to draw a new random sample. Question 1 - STA10003 The variable AvoidCope1 gives an indication of the extent to which each student uses avoidance coping strategies, as recorded at the beginning of the school year. This variable was scored on a scale that can take values from 0 to 20, with higher values representing a greater extent of using avoidance coping strategies. Previous research indicates that the Year 8 students have an average avoidance coping score of 8.5 at the start of a school year. However, an educational psychologist has claimed that this has now changed. Conduct a one-sample t-test using the AvoidCope1 variable to test this claim. Produce the relevant output and write a one-sample t-test report based on your output in the style presented in the week 6 Supplement G document on Report writing for hypothesis tests. Include the relevant output with your answer. Question 2 - STA10003 The variable ExtAgg gives an indication of the amount of external aggression displayed by each student, as recorded at the end of the school year. This variable was scored on a scale that can take values from 0 to 20, with higher values representing a greater level of external aggression. A school principal predicted that boys in Year 8 display more external aggression than girls in Year 8. Conduct an independent samples t-test (that is, an independent measures t-test) using the ExtAgg and Sex variables to test this claim. Produce the relevant output and write an independent samples t-test report based on your output in the style presented in the week 7 Supplement document on Reporting independent samples t-tests. Include the relevant output with your answer. Question 3 - STA10003 The variable Hostility gives an indication of the amount of internal aggression displayed by each student, as recorded at the end of the school year. This variable was scored on a scale that can take values from 0 to 20, with higher values representing a greater level of internal aggression. A school counselor believes that there is a difference, on average, between the level of internal aggression and the level of external aggression of Year 8 students. Conduct a paired samples t-test (that is, a related samples t-test) using the Hostility and ExtAgg variables to test this prediction. Produce the relevant output and write a paired samples t-test report based on your output in the style presented in the week 8 Supplement J document on Reporting paired samples t-tests. Question 4 - STA10003 An educational researcher wants to investigate the percentage of high school teachers in the district of Blueville who have been in their teaching job for more than 5 years. The researcher predicts that more than 45% of high school teachers in Blueville have been in their teaching job for more than 5 years. A random sample of high school teachers in Blueville was obtained and each teacher in the sample was asked how long they have been in their teaching job (‘5 years or less’ or ‘more than 5 years’) (a) What type of hypothesis test would be appropriate to investigate the educational researcher’s prediction? (b) What is the population we can draw conclusions about in this study? (c) The researcher predicts that more than 45% of high school teachers in the district of Blueville have been in their teaching job for more than 5 years. He conducted the appropriate hypothesis test and obtained a p-value of 0.143. Based on this result, he concludes that exactly 45% of high school teachers in the district of Blueville have been in their teaching job for more than 5 years. Comment on the validity of this conclusion. Provide justification for your answer.

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