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Statistics for Psychology
6th Edition
ISBN: 9780205258154
Author: Arthur Aron Ph.D., Elaine N. Aron Ph.D., Elliot Coups Ph.D., Cole Publishing
Publisher: PEARSON
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Chapter 1, Problem 4.3HD
a.
To determine
Identify the type of skew created by a floor effect.
b.
To determine
Identify the type of skew created by a ceiling effect.
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fr
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163586
5-37. The wooden plank resting between the buildings
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Examine the Variables: Carefully review and note the names of all variables in the dataset. Examples of these variables include:
Mileage (mpg)
Number of Cylinders (cyl)
Displacement (disp)
Horsepower (hp)
Research: Google to understand these variables.
Statistical Analysis: Select mpg variable, and perform the following statistical tests. Once you are done with these tests using mpg variable, repeat the same with hp
Mean
Median
First Quartile (Q1)
Second Quartile (Q2)
Third Quartile (Q3)
Fourth Quartile (Q4)
10th Percentile
70th Percentile
Skewness
Kurtosis
Document Your Results:
In RStudio: Before running each statistical test, provide a heading in the format shown at the bottom. “# Mean of mileage – Your name’s command”
In Microsoft Word: Once you've completed all tests, take a screenshot of your results in RStudio and paste it into a Microsoft Word document. Make sure that snapshots are very clear. You will need multiple snapshots. Also transfer these results to the…
Examine the Variables: Carefully review and note the names of all variables in the dataset. Examples of these variables include:
Mileage (mpg)
Number of Cylinders (cyl)
Displacement (disp)
Horsepower (hp)
Research: Google to understand these variables.
Statistical Analysis: Select mpg variable, and perform the following statistical tests. Once you are done with these tests using mpg variable, repeat the same with hp
Mean
Median
First Quartile (Q1)
Second Quartile (Q2)
Third Quartile (Q3)
Fourth Quartile (Q4)
10th Percentile
70th Percentile
Skewness
Kurtosis
Document Your Results:
In RStudio: Before running each statistical test, provide a heading in the format shown at the bottom. “# Mean of mileage – Your name’s command”
In Microsoft Word: Once you've completed all tests, take a screenshot of your results in RStudio and paste it into a Microsoft Word document. Make sure that snapshots are very clear. You will need multiple snapshots. Also transfer these results to the…
Chapter 1 Solutions
Statistics for Psychology
Ch. 1 - A father rates his daughter as a 2 on a 7-point...Ch. 1 - What is the difference between a numeric and a...Ch. 1 - Give the level of measurement of each of the...Ch. 1 - What is the difference between a discrete and a...Ch. 1 - What is a frequency table?
Ch. 1 - Why would a researcher want to make a frequency...Ch. 1 - Make a frequency table for the following scores:...Ch. 1 -
What does a grouped frequency table group?
Ch. 1 -
Why do researchers make histograms?
Ch. 1 - When making a histogram from a frequency table,...
Ch. 1 - Make a histogram based on the following frequency...Ch. 1 - How is a histogram based on a nominal variable...Ch. 1 - Describe the difference between a unimodal and...Ch. 1 - What does it mean to say that a distribution is...Ch. 1 - What kind of skew is created by (a) a floor effect...Ch. 1 - When a distribution is described as being peaked...Ch. 1 - A client rates her satisfaction with her...Ch. 1 - Give the level of measurement for each of the...Ch. 1 - A particular block in a suburban neighborhood has...Ch. 1 - Fifty students were asked how many hours they...Ch. 1 - These are the scores on a test of sensitivity to...Ch. 1 - The following data are the number of minutes it...Ch. 1 - Describe the shapes of the three distributions...Ch. 1 - Make up and draw an example of each of the...Ch. 1 - Explain to a person who has never had a course in...Ch. 1 - McKee and Ptacek (2001) asked 90 college students...Ch. 1 - A participant in a cognitive psychology study is...Ch. 1 - Explain and give an example for each of the...Ch. 1 - An organizational psychologist asks 20 employees...Ch. 1 - A social psychologist asked 15 college students...Ch. 1 - Following are the speeds of 40 cars clocked by...Ch. 1 - Here are the number of holiday gifts purchased by...Ch. 1 - Explain to a person who has never taken a course...Ch. 1 - Make up and draw an example of each of the...Ch. 1 - Raskauskas and Stoltz (2007) asked a group of 84...Ch. 1 - Mouradian (2001) surveyed college students...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
- Examine the Variables: Carefully review and note the names of all variables in the dataset. Examples of these variables include: Mileage (mpg) Number of Cylinders (cyl) Displacement (disp) Horsepower (hp) Research: Google to understand these variables. Statistical Analysis: Select mpg variable, and perform the following statistical tests. Once you are done with these tests using mpg variable, repeat the same with hp Mean Median First Quartile (Q1) Second Quartile (Q2) Third Quartile (Q3) Fourth Quartile (Q4) 10th Percentile 70th Percentile Skewness Kurtosis Document Your Results: In RStudio: Before running each statistical test, provide a heading in the format shown at the bottom. “# Mean of mileage – Your name’s command” In Microsoft Word: Once you've completed all tests, take a screenshot of your results in RStudio and paste it into a Microsoft Word document. Make sure that snapshots are very clear. You will need multiple snapshots. Also transfer these results to the…arrow_forward2 (VaR and ES) Suppose X1 are independent. Prove that ~ Unif[-0.5, 0.5] and X2 VaRa (X1X2) < VaRa(X1) + VaRa (X2). ~ Unif[-0.5, 0.5]arrow_forward8 (Correlation and Diversification) Assume we have two stocks, A and B, show that a particular combination of the two stocks produce a risk-free portfolio when the correlation between the return of A and B is -1.arrow_forward
- 9 (Portfolio allocation) Suppose R₁ and R2 are returns of 2 assets and with expected return and variance respectively r₁ and 72 and variance-covariance σ2, 0%½ and σ12. Find −∞ ≤ w ≤ ∞ such that the portfolio wR₁ + (1 - w) R₂ has the smallest risk.arrow_forward7 (Multivariate random variable) Suppose X, €1, €2, €3 are IID N(0, 1) and Y2 Y₁ = 0.2 0.8X + €1, Y₂ = 0.3 +0.7X+ €2, Y3 = 0.2 + 0.9X + €3. = (In models like this, X is called the common factors of Y₁, Y₂, Y3.) Y = (Y1, Y2, Y3). (a) Find E(Y) and cov(Y). (b) What can you observe from cov(Y). Writearrow_forward1 (VaR and ES) Suppose X ~ f(x) with 1+x, if 0> x > −1 f(x) = 1−x if 1 x > 0 Find VaRo.05 (X) and ES0.05 (X).arrow_forward
- Joy is making Christmas gifts. She has 6 1/12 feet of yarn and will need 4 1/4 to complete our project. How much yarn will she have left over compute this solution in two different ways arrow_forwardSolve for X. Explain each step. 2^2x • 2^-4=8arrow_forwardOne hundred people were surveyed, and one question pertained to their educational background. The results of this question and their genders are given in the following table. Female (F) Male (F′) Total College degree (D) 30 20 50 No college degree (D′) 30 20 50 Total 60 40 100 If a person is selected at random from those surveyed, find the probability of each of the following events.1. The person is female or has a college degree. Answer: equation editor Equation Editor 2. The person is male or does not have a college degree. Answer: equation editor Equation Editor 3. The person is female or does not have a college degree.arrow_forward
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