Statistics solving distributions with graphs

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timer Asked: Jan 25th, 2019
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Question Description

Pleas show any work in detail to solve. This assignment is based on the first 3 chapters in the book- The Basic Practices of statistics

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True/False for Questions 1 -10

1.?Histograms and stem plots are graphs of distributionswhere the variable is quantitative. 

2.?The slope and thecorrelation coefficient must always have the same sign.

3. ?When you use the median to describe the center of a distribution then you would use the standard deviation to describethe variability. 

 4. ?Variables such as zip codes, distance traveled and heightcan all be considered quantitative. 

5.?If a person had a Z-score of .25, then their actual raw score is in the lowest 25thpercent. 

6. ?The strength of relationship between two variables is approximated by the size of the slope. 

7. ?If the relationship between X and Y is very strong, then there is good evidence that changes in X cause changes in Y. 

8. ?The correlation coefficient (r) must be a value between -1.0 and +1.0. 

 9. ?The slope and the intercept both measure the average amount ofchange between two variables. 

 10. ?In a normal distribution, 5 % of the observations are less than two standard deviations below the mean. 

Tutor Answer

Chucks574
School: UIUC

Thank you so much

Running head: STATISTICS

1

STATISTICS:
Name:
Institution affiliation:
Date:

STATISTICS
2
True/False for Questions 1 -10
1. True Histograms and stem plots are graphs of distributions where the variable is quantitative.
2. True the slope and the correlation coefficient must always have the same sign.
3. False
When you use the median to describe the center of a distribution then you would use the standard
deviation to describe the variability.
4. False

False
6. False

Variables such as zip codes, distance traveled and height can all be considered quantitative. 5.
if a person had a Z-score of .25, then their actual raw score is in the lowest 25th percent.
The strength of relationship between two variables is approximated by the size of the slope.

7. True

If the relationship between X and Y is very strong, then there is good evidence that changes in X
cause changes in Y.

8. True

The correlation coefficient (r) must be a value between -1.0 and +1.0.

9. False

The slope and the intercept both measure the average amount of change between two variables.

10. True

In a normal distribution, 5 % of the observations are less than two standard deviations below the

mean.

FILL IN THE BLANK WITH A NUMBER, WORD OR SHORT ANSWER FOR Q11- Q20
11. In a regression problem, the fraction of the variation in Y that is explained by X is called the...

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Anonymous
Tutor went the extra mile to help me with this essay. Citations were a bit shaky but I appreciated how well he handled APA styles and how ok he was to change them even though I didnt specify. Got a B+ which is believable and acceptable.

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