ASSESSMENT 2 - ASSIGNMENT 1

ASSESSMENT 2 - ASSIGNMENT 1

STUDENT NAME STUDENT ID WORKSHOP DAY WORKSHOP TIME QUESTIONS

Question 1 (0.5+1.5+3+1+0.5+5+3.5 marks)

(a) Data type: (b) Total sales 2018 2020 2022 Comment: (c) Justification for the choice of chart: Chart: Comment on market leaders: (d) Advice: (e) Answer: (f) Justification for the choice of chart: Chart: Comment on the chart: Comment on change in market share between 2018 and 2022: List the top 5 brands in 2018 and 2022 and discuss advice to Brian (g) Justification for the choice of chart: Chart: Comment on the chart: Question 2 (3+8+4 marks)

(a) Justification for the choice of chart: Chart: Comment on the trend: (b) There is global warming if the average temperature anomalies over a period () is positive.

[Hint: Calculate the sample mean and sample standard deviation of the monthly temperature anomalies for the sample period 1958-2016 and test the hypothesis that the population mean temperature anomaly () is positive ( > 0?)].

Hypothesis testing

In the spaces below, complete each step of the Six-Step Process of Hypothesis Testing

Include the necessary information for each step

Step 1

(set up null and alternative hypotheses) Step 2

(determine test statistic and formula) Step 3

(specify the alpha) Step 4

(define decision rule) Step 5

(Calculate the value of the test statistic or p-value)

Choose the correct worksheet in the Test Statistics.xlsx workbook and enter the required entries in the grey shaded cells Sample mean =

Sample standard deviation =

Sample size =

Step 6

(Compare the values from the output using the Decision rule and reject or do not reject the alternative hypothesis. State your conclusion which should answer the research question) (c) Justification for the choice of chart: Chart:

include the trend line and the coefficient of determination R2on the chart

Comment on the chart: Interpret the slope coefficient of the trend line and comment on the fitness of the model.