Entries by Grace Wahito

Use the value of the linear correlation coefficient

March 25, 2020 in /by

Use the value of the linear correlation coefficient to calculate the coefficient determination. What does this tell you about the explained variation of the data about the regression line? About the unexplained variation? r = 0.357 Calculate the coefficient________________ ___________% of the variation can be explained by the regression line ___________% of the variation is […]

 

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Heights of men on a baseball team

March 25, 2020 in /by

Heights of men on a baseball team have a​ bell-shaped distribution with a mean of 178 cm and a standard deviation of 9 cm Using the empirical​ rule, what is the approximate percentage of the men between the following​ values? a. 151 cm and 205 cm b. 160 cm and 196 cm a. _____________​% of […]

 

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A poll of all 2000 students in a high school found that 94% of its students owned cell phones.

March 25, 2020 in /by

A poll of all 2000 students in a high school found that 94% of its students owned cell phones.>Choose the correct answer below.A.Parameter​, because the data set of a sample of students is a sample.B.Statistic​, because the data set of all 2000 students in a high school is a sample.C.Statistic​, because the data set of a sample of students is a sample.D.Parameter​, because the data set of all 2000 students in a high school is […]

 

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The time spent​ (in days) waiting for a heart

March 25, 2020 in /by

The time spent​ (in days) waiting for a heart transplant for people ages​ 35-49 can be approximiated by the normal​ distribution, as shown in the figure to the right. mean = 207 deviation = 25.3​ (a) What waiting time represents the 5th ​percentile? ​(b) What waiting time represents the third​ quartile? Round to the nearest […]

 

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