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Field-Discovering Statistics International Version (Homework)

James Finch

Statistics, section 2, Fall 2019

Instructor: Dr. Friendly

Current Score : 17 / 17

Due : Sunday, January 27, 2030 23:30 EST

Last Saved : n/a Saving...  ()

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17/17 (100.0%)

  • Instructions

    Create your course assignments by selecting from our collection of questions written by the author himself but not found in the standard textbook. A complete, interactive eBook version of the original published text is also available.

    There are two types of questions available: Numeric and Multiple Choice. Whenever possible, values have been randomized so that each student receives a unique version of the question.

    As an added benefit, when a student answers a question correctly or incorrectly a link to the relevant reading section from the textbook is provided to guide them. For most Multiple Choice type questions, students are also provided with feedback written by the author on why their choice is correct or incorrect.

    In this assignment we present several question types written for Discovering Statistics Using IBM SPSS Statistics--Europe, Middle East, Africa and Asia Version 4/e by Andy Field published by SAGE Publications Ltd.

    Click here for a list of all of the questions coded in WebAssign.

Assignment Submission

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Assignment Scoring

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1. 4/4 points  |  Previous Answers FieldStatINT4 1.Num.001. My Notes
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A statistics lecturer was interested in how many text messages students sent during his lectures. He borrowed a random sample of students' phones and by looking at the date/time of messages on each phone counted how many texts had been sent during his last lecture.
17, 13, 15, 13, 14, 16
(a) Compute the mean. (Round your answer to one decimal place.)
Correct: Your answer is correct. (see Section 1.6.2)

(b) Compute the median.
Correct: Your answer is correct. (see Section 1.6.2)

(c) Compute the range.
Correct: Your answer is correct. (see Section 1.6.3)

(d) Compute the mode.
Correct: Your answer is correct. (see Section 1.6.2)
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2. 4/4 points  |  Previous Answers FieldStatINT4 1.Num.004. My Notes
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1 2 3 4
1/1 1/1 1/1 1/1
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4/4
 
Below is a frequency distribution of 34 customer reviews from www.amazon.co.uk of a book called Running Sucks by Jennifer Jolan.
(a) What would be our estimate of the variance in the population? (Round your answer to three decimal places.)
Correct: Your answer is correct. (see Section 1.6.3)

(b) What is the range of these data?
Correct: Your answer is correct. (see Section 1.6.2)

(c) What is the interquartile range of these data?
Correct: Your answer is correct. (see Section 1.6.2)

(d) How would you describe the frequency distribution above? (Hint: This is a bit tricky because the Amazon histogram is labelled from high to low.)
     Correct: Your answer is correct.
(see Section 1.6.1)
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3. 3/3 points  |  Previous Answers FieldStatINT4 1.Num.006. My Notes
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1 2 3
1/1 1/1 1/1
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3/3
 
In a sample of 1000 clinically anxious mothers, a psychopathologist recorded the anxiety levels in their eldest child. To measure the variance in the children's anxiety scores, he computed SS = 16000 for this sample.
(a) What are the degrees of freedom for the variance?
Correct: Your answer is correct. (see Section 1.6.3)

(b) Compute the variance.
Correct: Your answer is correct. (see Section 1.6.3)

(c) Compute the standard deviation.
Correct: Your answer is correct. (see Section 1.6.3)
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4. 1/1 points  |  Previous Answers FieldStatINT4 1.MC.004. My Notes
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1/1
 
Which of the following best describes a confounding variable?
     Correct: Your answer is correct.
Yes, this is correct because a confounding variable is an unforeseen and unaccounted-for variable that jeopardizes reliability and validity of an experiment's outcome (see Section 1.5.5).
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5. 1/1 points  |  Previous Answers FieldStatINT4 1.MC.005. My Notes
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1/1
 
A demand characteristic is:
     Correct: Your answer is correct.
Yes, this is correct; a demand characteristic refers to an experimental artefact where participants form an interpretation of the experiment's purpose and unconsciously change their behaviour to fit that interpretation.
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6. 1/1 points  |  Previous Answers FieldStatINT4 1.Business.007. My Notes
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1/1
 
If we calculated that the correlation (i.e. the effect size) of company size and sales revenue for various organizations was r = .42, which expression would best describe this relationship?
     Correct: Your answer is correct.
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7. 1/1 points  |  Previous Answers FieldStatINT4 1.Education.003. My Notes
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1/1
 
Which of the following is an effective data collection tool in educational research?
     Correct: Your answer is correct.
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8. 1/1 points  |  Previous Answers FieldStatINT4 1.Health.008. My Notes
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1/1
 
What does the data in the chart demonstrate?


     Correct: Your answer is correct.
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9. 1/1 points  |  Previous Answers FieldStatINT4 1.SportsScience.007. My Notes
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If sport and exercise science students were asked to rank biomechanics, physiology, psychology, nutrition and research methods on a 1–5 scale, with 1 being the subject you like the most and 5 being the one you like the least, which level of measurement would it be?
     Correct: Your answer is correct.
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