ch10prac MULTIPLE CHOICE. Choose the one …

1 Ch10pracMULTIPLE choice . Choose the one alternative that best completes the statement or answers the the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding tostate whether or not the given r represents a significant linear correlation. Use a significance level of )r= , n= 251)A)Critical values: r= , significant linear correlationB)Critical values: r= , no significant linear correlationC)Critical values: r= , no significant linear correlationD)Critical values: r= , significant linear correlation2)r= , n= 152)A)Critical values: r= , no significant linear correlationB)Critical values: r= , significant linear correlationC)Critical values: r= , no significant linear correlationD)Critical values: r= , no significant linear correlationDetermine which scatterplot shows the strongest linear )Which shows the strongest linear correlation?

2 3)A)B)C)Find the value of the linear correlation coefficient )The paired data below consist of the test scores of 6 randomly selected students and the number ofhours they studied for the test. Hours 5 10 4 6 10 9 Score 6486698659874)A) ) ) ) you will perform a test to determine whether there is sufficient evidence to support a claim of a linearcorrelation between two variables. Find the critical values of r given the number of pairs of data n and the significancelevel .5)n=14, = )A)r= )r= )r= )r= )n=40, = )A)r= )r= )r= )r= the given data to find the best predicted value of the response )^Four pairs of data yield r= and the regression equationy= 3x. Also,y= What is thebest predicted value of y forx= )A) ) ) ) )^Eight pairs of data yield r= and the regression equationy= + Also,y= is the best predicted value of y forx= )A) ) ) ) the given data to find the equation of the regression line.

3 Round the final values to three significant digits, ) x 24 26 28 30 32y15132016249)A)^y= + )^y= + )^y= + )^y= + an appropriate )For the data below, determine the value of the linear correlation coefficient r between y )A) ) ) ) the given information to find the coefficient of )Find the coefficient of determination, given that the value of the linear correlation coefficient, r, )A) ) ) ) )^The test scores of 6 randomly picked students and the numbers of hours they prepared are asfollows: Hours 5 10 4 6 10 9 Score 648669865987 The equation of the regression line isy= + Find the coefficient of )A) ) ) ) the explained variation for the paired )^The equation of the regression line for the paired data below isy= 3x. Find the explained variation. x 2 4 5 6y711132013)A) ) ) ) the unexplained variation for the paired )^The equation of the regression line for the paired data below isy= 3x.

4 Find the unexplainedvariation. x 2 4 5 6y711132014)A) ) ) ) the total variation for the paired )^The equation of the regression line for the paired data below isy= 3x. Find the total variation. x 2 4 5 6y711132015)A) ) ) ) the standard error of estimate for the given paired )^The equation of the regression line for the paired data below isy= 3x. Find the standard error ofestimate. x 2 4 5 6y711132016)A) ) ) ) the indicated prediction interval for an individual )^The equation of the regression line for the paired data below isy= 3x and the standard error ofestimate isse= Find the 90% prediction interval of y for x= 3. x 2 4 5 6y711132017)A) < y< ) < y< ) < y< ) < y< :AACCBADDABCCDAAAA3