Statistics

SMAT 130B-01 – CRN: 10227: Use the data in the table below to complete parts​ (a) through​ (d).

SMAT 130B-01 – CRN: 10227: Construct a scatter plot of the data and draw the regression line. Choose the correct graph below.

SMAT 130B-01 – CRN: 10227: Find the equation of the regression line for the given data. Then construct a scatter plot of the data and draw the regression line.​ (The pair of variables have a significant​ correlation.) Then use the regression equation to predict the value of y for each of the given​ x-values, if meaningful. The number of hours 6 students spent for a test and their scores on that test are shown below.

SMAT 130B-01 – CRN: 10227: Question content area top Part 1 Find the equation of the regression line for the given data. Then construct a scatter plot of the data and draw the regression line.​ (The pair of variables have a significant​ correlation.) Then use the regression equation to predict the value of y for each of the given​ x-values, if meaningful. The table below shows the heights​ (in feet) and the number of stories of six notable buildings in a city.

SMAT 130B-01 – CRN: 10227: Two variables have a positive linear correlation. Is the slope of the regression line for the variables positive or​ negative?

Two variables have a positive linear correlation. Is the slope of the regression line for the variables positive or​ negative? Question content area bottom Part 1 A. The slope is negative. As the independent variable increases the dependent variable tends to decrease. B. The slope is positive. As the independent variable increases the dependent variable also […]

SMAT 130B-01 – CRN: 10227: What is a​ residual? Explain when a residual is​ positive, negative, and zero.

What is a​ residual? Explain when a residual is​ positive, negative, and zero. Question content area bottom Part 1 A. A residual is the difference between the observed​ y-value of a data point and the predicted​ y-value on a regression line for the​ x-coordinate of the data point. A residual is positive when the point is below the​ line, negative when […]

SMAT 130B-01 – CRN: 10227: Calculate the correlation coefficient​ r, letting Row 1 represent the​ x-values and Row 2 the​ y-values.

SMAT 130B-01 – CRN: 10227: The accompanying table shows the ages​ (in years) of children and the numbers of words in their vocabulary. Complete parts​ (a) through​ (d) below.

SMAT 130B-01 – CRN: 10227: Question content area top Part 1 Value of home and life span are two variables that have been shown to have positive correlation but no​ cause-and-effect relationship. Describe at least one possible reason for the correlation.

Question content area top Part 1 Value of home and life span are two variables that have been shown to have positive correlation but no​ cause-and-effect relationship. Describe at least one possible reason for the correlation. Question content area bottom Part 1 Select all that apply. A. Greater wealth allows people to afford more valuable homes […]

SMAT 130B-01 – CRN: 10227: Identify the explanatory variable and the response variable.

Identify the explanatory variable and the response variable. A farmer wants to determine if the temperature received by similar crops can be used to predict the harvest of the crop. Question content area bottom Part 1 The explanatory variable is the temperature . The response variable is the harvest of the crop .