As compare to other scatterplots, scatterplot 3 indicates that most of the data points form a straight line or lies close to the straight line, hence this scatterplot represents the strongest linear correlation.

Question

2020-11-08

A linear relationship can be best described by a straight line. In the scatterplot, if a straight line is drawn, all the data points lie on the straight line or around the straight line.

As compare to other scatterplots, scatterplot 3 indicates that most of the data points form a straight line or lies close to the straight line, hence this scatterplot represents the strongest linear correlation.

As compare to other scatterplots, scatterplot 3 indicates that most of the data points form a straight line or lies close to the straight line, hence this scatterplot represents the strongest linear correlation.

asked 2021-01-08

asked 2021-02-25

a. Make a scatterplot for the data in the table below.

Height and Weight of Football Players

\(\begin{array}{|c|c|}\hline \text{Height (in.):} & 77 & 75 & 76 & 70 & 70 & 73 & 74 & 74 & 73 \\ \hline \text{Weight (lb):} & 230 & 220 & 212 & 190 & 201 & 245 & 218 & 260 & 196 \\ \hline \end{array}\)

b. Which display - the table or the scatter plot - do you think is a more appropriate display of the data? Explain your reasoning.

asked 2021-02-03

a. Draw a scatterplot of y versus x.

b. The equation of the least-squares line is 0.45x. Draw this line on your scatterplot. Do there appear to be any large residuals?

c. Compute the residuals, and construct a residual plot. Are there any unusual features in the plot?

\(\begin{array}{|c|c|}\hline x & 40 & 50 & 60 & 70 & 80 & 90 & 100 \\ \hline y & 58 & 34 & 32 & 30 & 28 & 27 & 22 \\ \hline \end{array}\)

\(\displaystyle{\left[\hat{{{y}}}={64.50}\right]}\).

asked 2021-02-19

\((1,\ 2),\ (7,\ 9.5),\ (4,\ 7),\ (2,\ 4.2),\ (6,\ 8.25),\ (3,\ 5.8),\ (5,\ 8),\ (8,\ 10),\ (0,\ 0)\)

asked 2021-03-06

Height and Weight of Females

\(\begin{array}{|c|c|}\hline \text{Height (in.):} & 58 & 60 & 62 & 64 & 65 & 66 & 68 & 70 & 72 \\ \hline \text{Weight (lb):} & 115 & 120 & 125 & 133 & 136 & 115 & 146 & 153 & 159 \\ \hline \end{array}\)

asked 2021-01-04

State the slope and y-intercept of the equation. \(5x + 4y = 20\)

asked 2021-01-31

\(\begin{array}{|c|c|}\hline \text{Hits:} & 7 & 8 & 4 & 11 & 8 & 2 & 5 & 9 & 1 & 4 \\ \hline \text{Runs:} & 3 & 2 & 2 & 7 & 4 & 2 & 1 & 3 & 0 & 1 \\ \hline \end{array}\)

asked 2021-01-13

\(\begin{array}{|c|c|}\hline x & 2761 & 19764 & 25713 & 3980 & 12782 & 19008 & 19028 & 14397 & 9606 & 3905 & 25731 \\ \hline y & 1553 & 14999 & 32813 & 1667 & 8741 & 16526 & 26770 & 16526 & 9868 & 6640 & 1220 & 30730 \\ \hline \end{array}\)

Here is Minitab output from fitting the simple linear regression model. Does the model appear to specify a useful relationship between the two variables?

\(\begin{array}{|c|c|}\hline \text{Predictor Coef SE Coef T P Constant} & -5090 & 2257 & -2.26 & 0.048 \\ \hline \text{Pressure} & 1.2912 & 0.1347 & 9.59 & 0.000 \\ \hline \end{array}\)

\([S=3679.36, R-Sq = 90.2\%, R-Sq(adj)=89.2\% ]\).

asked 2020-11-29

Then find the change in y for a one-unit change in x, find the point at which the line crosses the y-axis, and calculate the value of y when x 52.5.

1. \(y x\ 5\ 1\ 2.0\ 0.5\)

2. \(y x\ 5\ 1\ 40\ 36.2\)

3. \(y x\ 5\ 25\ 6\)

Scatterplots For the scatterplots in Exercises 5 describe the pattern that you see. How strong is the pattern? Do you see any outliers or clusters?

asked 2020-12-07