Scatterplots Which of the scatterplots below show

a) little or no association?

b) a negative association?

c) a linear association?

d) a moderately strong association?

e) a very strong association?

glamrockqueen7
2021-01-04
Answered

Scatterplots Which of the scatterplots below show

a) little or no association?

b) a negative association?

c) a linear association?

d) a moderately strong association?

e) a very strong association?

You can still ask an expert for help

mhalmantus

Answered 2021-01-05
Author has **106** answers

Solution:

a) Little or no association: Scatterplot (1) does not show any pattern. Therefore, it shows little or no association.

b) Negative association: Scatterplot (4) shows a downward tendency pattern. Therefore, it shows a negative association.

c) Linear association: Scatterplot (2) and (4) show upward and downward tendency patterns respectively. Therefore, it shows a linear association.

d) Moderately strong association: Scatterplot (3) shows a parabolic nature. Therefore, it shows a moderately strong association.

e) Strong association: Scatterplot (2) and (4) show a linear upward and downward tendency. Therefore, it shows a very strong association.

a) Little or no association: Scatterplot (1) does not show any pattern. Therefore, it shows little or no association.

b) Negative association: Scatterplot (4) shows a downward tendency pattern. Therefore, it shows a negative association.

c) Linear association: Scatterplot (2) and (4) show upward and downward tendency patterns respectively. Therefore, it shows a linear association.

d) Moderately strong association: Scatterplot (3) shows a parabolic nature. Therefore, it shows a moderately strong association.

e) Strong association: Scatterplot (2) and (4) show a linear upward and downward tendency. Therefore, it shows a very strong association.

asked 2021-03-02

1) In what way is the point unusual? Does it have high leverage, a large residual, or both?

2) Do you think that point is an influential point?

3) If that point were removed, would the correlation be- come stronger or weaker? Explain.

4) If that point were removed, would the slope of the re- gression line increase or decrease? Explain

asked 2022-05-02

Probability and Statistics (Quartiles)

Q: Find the upper and lower quartiles of the random variable.

$f(x)=\frac{1}{x\mathrm{ln}(1.5)}$

for $4\le x\le 6$

I set $F(x)=0.25$ and $F(x)=0.75$ to denote $Q1$ and $Q3$

This is what I got for the answers:

For

$F(X)=0.25,x=9.86$

For

$F(X)=0.75,x=3.28$

However, these answers are wrong as compared with my textbook. It should be:

For

$F(X)=0.25,x=4.43$

For

$F(X)=0.75,x=5.42$

Please help me. I don't know what I'm doing wrong.

Q: Find the upper and lower quartiles of the random variable.

$f(x)=\frac{1}{x\mathrm{ln}(1.5)}$

for $4\le x\le 6$

I set $F(x)=0.25$ and $F(x)=0.75$ to denote $Q1$ and $Q3$

This is what I got for the answers:

For

$F(X)=0.25,x=9.86$

For

$F(X)=0.75,x=3.28$

However, these answers are wrong as compared with my textbook. It should be:

For

$F(X)=0.25,x=4.43$

For

$F(X)=0.75,x=5.42$

Please help me. I don't know what I'm doing wrong.

asked 2021-11-30

Solve for the mode and range of the given data. Show your solutions on the space provided.

$$\begin{array}{|ccc|}\hline Data& Mode& Range\\ 10,7,7,4,5,6,4& 1& 2\\ 4.2,3.9,4.6,5.1,3.8,4.7,3.5& 3& 4\\ 5.1,3.2,4.7,4.0,3.6& 5& 6\\ \hline\end{array}$$

asked 2021-11-30

A learning management system allows users to take up to 4 different practice exams before taking the actual exam. Data is collected from 40 users of the product regarding the number of practice exams each used.

$$\begin{array}{|cccccc|}\hline \text{Number of Practice Exams Taken}& 0& 1& 2& 3& 4\\ Frequency& 5& 10& 13& 9& 3\\ \hline\end{array}$$

Based on the data, find the estimated probability (relative frequency) that a user will take more than one practice exam.

Given your answer as a decimal.

The probability is ?

Based on the data, find the estimated probability (relative frequency) that a user will take more than one practice exam.

Given your answer as a decimal.

The probability is ?

asked 2021-06-23

A researcher randomly surveys people with a medical condition about whether they received a treatment and whether their condition improved. The results are shown. Make a two-way table that includes the marginal frequencies. Treatment
Improved: 34
Did not improve: 10
Not Treatment
Improved: 12
Did not improve: 29

asked 2021-12-09

These three data sets show the number of text messages sent by Jada, Diego, and Lin over 6 days as well as the mean number of text messages sent by each student per day.

Jada: mean 5

4 4 4 6 6 6

Diego: mean 6

4 5 5 6 8 8

Lin: mean 4

1 1 2 2 9 9

Compute the MAD for Jada's data set.

Jada: mean 5

4 4 4 6 6 6

Diego: mean 6

4 5 5 6 8 8

Lin: mean 4

1 1 2 2 9 9

Compute the MAD for Jada's data set.

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An article reported that, in a study of a particular wafer inspection process, 356 dies were examined by an inspection probe and 239 of these passed the probe. Assuming a stable process, calculate a 95% (two-sided) confidence interval for the proportion of all dies that pass the probe. (Round your answers to three decimal places.)