Reference no: EM133902538

Question 1
Review the material in Guided Practice Example 2.1 of the website and answer the following question.
a. For the treatment group, what proportion (a number less than one) of patients had a stroke within 365 days? (two decimal places)

Question 2

Review the material in Guided Practice Example 2.1 of the website and answer the following question.

a. For the control group, what proportion (a number less than one) of patients had a stroke within 365 days? (two decimal places)

Question 3
Read through section 2.2.1 on Types of variables. What kind of variable is the mortage variable. (one word)

Question  4
Read Section 2.2.1 on Types of variables. The variable "sa2..names- can take up to 2,240 values, each one representing one of the statistical areas into which Australia can be divided. what type of variable is this called (one word)

Question 5
Review Figure 2.1 on the website. Numerical variables can be further divided Into continuous variables and what other type of variable. (one word)

Question  6
Review Figure 2.1 on the website. Categrical variables can be further divided into nominal variables and what other type of variable. (one word)

Question 7
Scatterplots are one type of graph used to study the relationship between two variables. What type of variables are displayed in a scatterplot. (one word)

Question  8
Reveiw the material on sampling from a population. The act of taking a simple random sample helps minimize Receive top-tier assignment help in any subject today.

Question 9
Review the material on observational studies and experiments. When researchers want to investigate the possibility of a causal connection, they usually conduct an (one word)

Question  10
Review the material introducing observational studies and experiments. When individuals are randomly assigned to a group, the experiment is called a experiment.

Question 11: Consider the table below.

Table 1 Hypothetical Species count data to measure biodiversity

What of the following is the correct conclusion about biodiversity changes in these three ecosystems over time based on the Species Richness Index (SRI) and the Shannon Wiener Index (SWI)? (there is one correct answer)

a. According to the SRI, there has been no change in Ecosystems 1 and 3, but a degradation in Ecosystem 2. According to the SWI, there has been no change in Ecosystem 3, but a degradation in Ecosystems 1 and 2.

b. According to the SRI, there has been a degradation in Ecosystems 1, 2, and 3. According to the SWI, there has been a degradation in Ecosystems 1.2. and 3.

c. According to the SRI, there has been no change in Ecosystem 3, but a degradation in Ecosystems 1 and 2. According to the SWI, there has been no change in Ecosystems 1 and 3, but a degradation in Ecosystem 2.

C d. According to the SRI, there has been no change in Ecosystem 3, but a degradation in Ecosystems 1 and 2. According to the SWI, there has been no change in Ecosystem 3, but a degradation in Ecosystems 1 and 2.

Question 12

Consider the three hypothetical ecosystems below.

Table 11 Hypothetical Species count data to measure biodiversity

How would you write out the Shannon Wiener Index for Ecosystem 3, Time period Two? (multiple answers possible)

Question 13

Read Section 2.2 'Data Basics' of the website. We introduced different types of variables in Section 2.2. Match the variables from Table 2.5 with the correct variable type.

- V Numerical - continuous 1. SA2-name
Numerical - discrete 2. Proportion of units
Categorical - nominal (Unordered) 3. Income
Categorical - ordinal 4. Persons

Question 14

Once you open R studio, the first thing you do will be what?
Set the working directory path to the folder where all my SCIE1104 script files and data files are
Look to the answer above for the correct response. It is good practice to always start by setting the working directory path so that things do not get lost.

Question 15
Match the relevant text with respect to saving graphics when using R. Note there is also a recording on the LMS that describes a process you could use for getting figures from R to Word.

v When using a PC you select the Save Image option and then save the graphic as a
v When using a mac you can 'save as'
v The steps involved to allow full control over image quality and image format are explained in
A. Section 6.4 of the course text book.
B. a pdf and then drag the pdf into your word document, or otherwise add as per standard practice.
C. metafile and then insert the metafile image directly into a place-holder you have created in the Word document.

Question 16
The Week 3 lecture identified a number of non-use biodiversity values. What were these values?q a. Bird watching• b. Bush walkingq c. Existence valueq ci. Altruistic value e. Bequest value QUESTION 2

Which of the following are used to create the five number summaries?
a. Maximum
b. Spread
c. Mean
d. Median
e. Minimum
f. Lower quartile g. Upper quartile

Question 17
In a boxplot, what part of the distribution does the 'box' represent? LI a. The inter-quartile range (Q1-Q3).
LI b. The middle 50 percent of the distribution.
• c. The lower 50 percent of the distribution. El d. The upper 50 percent of the distribution.

Question 18
In the computer lab this week, you needed to calculate the Shannon-Wiener Index and the Relative Diversity Index for tree ecosystems in five time periods.
To three decimal places, what was the Relative Diversity Index in 2015?

Question 19
when working with data in R, wide format data means that there is one column for each item of focus. So, if comparing bird sighting at three different farm sites, if the data is in wide format there would be v columns of data. Long format data means that there is one colum that contains all the numerical values and one column that contains all the matching location names. So, if comparing bird sighting at three different farm sites, if the data is in long format there would be columns of data.

Question 20

This question relates to test example 10.2.2 in the textbook (website). You may want to write out your answer first before filling in the blanks with the drop-down menu. From the reported test output, we see that the p-value is < 0.0001, we v . This
also means that there is

Question 21

evidence to conclude that mean C07 levels for 1957-

This question relates to Chapter 10 of the unit website/textbook, What is the formula for the t-test?