2. What does it mean for a scatter plot to have a negative trend?O A. Higher c-values tend to go with higher y-values.OB. Higher -values tend to go with lower y-values.OC. The x- and y-values appear to be unrelated.OD. None of these are true.

Positive trend : If direction of data points is positive and In upward direction than it is…

Answered: 2. What does it mean for a scatter plot…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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a. Which point is an outlier? Ignoring the outlier, estimate or compute the correlation coefficient for the remaining points. b. Now include the outlier. How does the outlier impact the correlation coefficient? a. The outlier is the point nothing. (Type an ordered pair. Round to one decimal place as needed.) What is the correlation coefficient if the outlier is excluded? A. 0.50 B. 0.97 C. −0.97 D. −0.50 b. How does the outlier affect the correlation coefficient? A. Including the outlier will decrease the correlation coefficient. B. Including the outlier will increase the correlation coefficient. C. Including the outlier will have no effect on the correlation coefficient.
If the correlation between two variables is close to 0, you can conclude that a scatterplot would show A. no straight-line pattern, but there might be a strong pattern of another form. B. a cloud of points with no visible pattern. C. a strong straight-line pattern. D. None of the above. (b) In a scatterplot of the average price of a barrel of oil and the average retail price of a gallon of gasoline, you expect to see A. very little association. B. a negative association. C. a positive association. D. None of the above. (c) You have data for many years on the average price of a barrel of oil and the average retail price of a gallon of unleaded regular gasoline. When you make a scatterplot, the explanatory variable on the x -axis A. can be either oil price or gasoline price. B. is the price of oil. C. is the price of gasoline. D. None of the above.
If the students read only 101 books for the month of June, which measure of central tendency will have the greatest change? A. The median will have the greatest change. B. The mean will have the greatest change. C. All measures will have an equal change. D. The mode will have the greatest change.
S3.3. The following data set represent the time (in minutes) necessary to travel from one citysector to another.53 57 60 57 54 53 54 53 54 42 48 53 47 47 50 48 42 42 54 54 60(a) Make a box plot of the data set; (b) How many data entries fall on or below the thirdquartile?
A manager of a local retail store analyzes the relationship between the number of rainy days and sales by reviewing the store’s data for the previous six months. She computes the correlation between sales and number of rainy days as -0.90. Select ALL that apply. a. There is a strong positive linear relationship between sales and number of rainy days. b. As the number of rainy days increases sales decrease. c. As the number of rainy days increases sales increase. d. There is a strong negative linear relationship between sales and the number of rainy days.
15.16 The 2008 and 2012 presidential elections. Democrat Barack Obama was elected president in 2008 and 2012. Figure 15.6 plots the percentage who voted for Obama in 2008 and 2012 for each of the 50 states and the District of Columbia. a. Describe in words the direction, form, and strength of the relationship between the percentage of votes for Obama in 2008 and the percentage in 2012. Are there any unusual features in the plot?
What type of relationship exists between the two variables x and y in the scatter plot? A.Positive correlation B.No correlation C.Negative correlation D.None of the choices
Mr. Friend noticed that meetings tended to start late when there were a lot of people in attendance and decided to study that relationship. He collecting data on the number of people who were attending each meeting and the number of minutes late that the meeting started. He noticed there was one point that seemed unusual, so he removed it from the data set. What is true about the point that was removed? a. the point is not unusualb. It is an influential observationc. It has the largest residuald. The slope changes little when the point is removedSelected:e. The correlation is lower with the removal of the point
What type of correlation is exhibited by the following graph? Independent Variable a. Positive Correlation b. No Correlation c. Negative Correlation d. Either positive or negative correlation Dependent Variable
Identify the type of correlation in the following scatter plot. e Skip step McCully, Aliyah 9. 24AMCCully21C
Which of the following best describe a -0.85 correlation between two sets of data? A. When one series increases, other increases in almost the same proportion. B. When one series decreases, other increases in almost the same proportion. C. When one series decreases, other decreases in almost the same proportion. D. When one series increases or decreases, other series does not change.
2. In volleyball statistics, a block is recorded when a player deflects the ball hit fres opposing team. Additionally, scorekeepers often keep track of the average number blocks a player records in a game. Here is part of a table that records the number os blocks and blocks per game for each player in a women’s volleyball tournament.A scatter plot that goes with the table follows. blocks blocks per game 13 1.18 1 5 0.17 0.42 7 0.64 020 2 201 1.5 208.0 201 1 0.5 7.5 15 22.5 30 a. What should be the label on the horizontal axis of the scatter plot? b. What should be the label on the vertical axis of the scatter plot? c. Using the scatter plot, predict the number of blocks for a player that averages 1.7 blocks per game.

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2. What does it mean for a scatter plot to have a negative trend? O A. Higher a-values tend to go with higher y-values. OB. Higher a-values tend to go with lower y-values. OC. The - and y-values appear to be unrelated. OD. None of these are true.