MAT 024 P2 MASTERY TEST

What is the range of the given data set: 35, 38  19,  30,  12,  15,  21,  32,  30,  23 ?            

• 38

• 26

• 49

• 44

Suppose you are using Regression analysis to determine the significant relationship between students preference in digital classroom and frequency of hours they are required to attend. The regression equation in this case explains the __________________________________________ .

• predicting behavior of any variable.

• predicting process of all the variables.

• amount of variations is observable in the independent variable x.

• amount of variations is observable in the dependent variable y.

Suppose you are using Regression analysis to determine the significant relationship between students preference in digital classroom and frequency of hours they are required to attend. The regression equation in this case explains the __________________________________________ .

• predicting behavior of any variable.

• predicting process of all the variables.

• amount of variations is observable in the independent variable x.

• amount of variations is observable in the dependent variable y.

Which of the following correlation statement is INCORRECT?

• There is a correlation coefficient of 0.33 between the position a football player plays and their weight.

• There is a high Pearson-r correlation value (r = 0.91) between the height and age of children.

• The correlation value (r) between planting rate and yield of corn was found to be, r = 0.23 .

• The computed correlation coefficient between the gas mileage of a car and its weight is 1.92 .

As a college student doing your thesis about the effectiveness of malunggay extract to increase iron level in the blood of white mice you've noticed that the data you have collected were not consistent during the 3 weeks of observation.  What statistical measure will you apply to show the generalized amount of spread in the data?

• Variability

• Location

• Central Tendency

• Prediction

All of the following increase the width of a confidence interval except:   

• Increased sample size

• Decreased sample size

• Increased confidence level

• Increased variability

Determine the standard deviation of a data set with n =14.

Data Set:  23, 15, 10, 20, 22, 25, 32, 12, 9, 16, 22, 8, 11, 30

• 8.97

• 8.36

• 7.21

• 7.81

Suppose the correlation coefficient between height (as measured in feet) versus weight (as measured in pounds) is 0.30. What is the correlation coefficient of height measured in inches versus weight measured in ounces? [12 inches = one foot; 16 ounces = one pound]

• cannot be determined from information given

• 0.533

• 0.40

• 0.30

The probability of Type 1 error is referred as?

• 1 - α

• α

• 1 - β

• β

In a distribution with 240 sample size, the variance is 239.94 and the mean is 92.97, what is the value of its standard deviation?

• 15.49

• lesser than the mean but higher than the standard deviation

• cannot be determined because the data set is missing

• 5.90