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# STAT670 Introductory Statistics

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## Question:

Question 1

1. Describe the target population for this study in one sentence.
2. Do you think that this sample is representative of this target population? Briefly justify your answer.
3. Identify the variable type for each of these variables.
4. Indicate an appropriate graphical display to show the distribution for the number of words in magazine advertisements.
5. Indicate an appropriate graphical display to show the distribution for the various types of magazine advertisements.

Question 2

Use the Magazines.mtw file to calculate the following, giving answers to 2dp:

4. the mean number of words with 3 or more syllables in advertisements frommagazines which have readers with a high level of education.
5. the mean number of words with 3 or more syllables in advertisements for either food or cosmetics.

Question 3

Use the Magazines.mtw file to produce: 1. an appropriate graphical summary and 2. an appropriate numerical summary to address each of the following research questions. Copy and paste output from Minitab into your solution and type in brief but informative comments addressing each question. Make sure that your output is clearly labelled. You will need to recode some of the variables to do this.

1. Is there an association between the educational level of magazines and the type of advertisements placed in them?
3. Is there a relationship between the number of words and the number of sentences in advertisements?

Question 4

You should use Minitab to find answers to the following probability questions. Use Minitab’s Graph menu and obtain Probability Distribution plots for each question. Type up the answer to each question in a clear sentence.

Say we are told that surface skin areas among human adults are normally distributed with a mean of 1.8 square metres and standard deviation of 0.25 square metres.

1. What percentage of adult humans would be expected to have a skin surface which is greater than 1.3 square metres in area?
2. Among a sample of 1000 randomly selected adult humans, how many would be expected to have a skin surface which is between 1.7 and 2.4 square metres in area?
3. What would be the interquartile range for skin surface areas among adult humans?

### Cite This Work

My Assignment Help (2021) Introductory Statistics [Online]. Available from: https://myassignmenthelp.com/free-samples/stat670-introductory-statistics/visualization-and-modeling-techniques.html
[Accessed 15 April 2021].

My Assignment Help. 'Introductory Statistics' (My Assignment Help, 2021) <https://myassignmenthelp.com/free-samples/stat670-introductory-statistics/visualization-and-modeling-techniques.html> accessed 15 April 2021.

My Assignment Help. Introductory Statistics [Internet]. My Assignment Help. 2021 [cited 15 April 2021]. Available from: https://myassignmenthelp.com/free-samples/stat670-introductory-statistics/visualization-and-modeling-techniques.html.

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