# Mathematics.

A college football coach wants to know if there is a correlation between his players’ leg strength and the time it takes for them to sprint 40 yards. He sets up the following test and records the data:

Every day for a week, he counts how many times each player can leg press 350 pounds. The following week, he has each player sprint 40 yards every day. The table shows the average number of leg-press repetitions and the average 40-yard dash time (in seconds) for seven randomly selected players. What is the equation of the line of best fit? How many seconds should he expect a player to take to run 40 yards if that player can do 22 leg-press repetitions? Round any values to the nearest tenth, if necessary.

[] means space.

Leg Press(Reps) (x) 15 [] 18 [] 8 [] 30 [] 26[] 12 [] 21 []

40-Yard Dash(s) (y) 5.2 [] 6.3 [] 6.8 [] 8.2 [] 8.0 [] 5.3 [] 5.9 []

Also, I need help with this one please.

You use a line of best fit for a set of data to make a prediction about an unknown value. The correlation coefficient for your dataset is -0.015. How confident can you be that your predicted value will be reasonably close to the actual value?

Please give me a response that tells me how confident I will be and how close the answer is.

1. 👍 1
2. 👎 0
3. 👁 243
1. This is only an answer to the second part. (I did not calculate the correlation coefficient for the first part.)

With r = -.015 being so close to zero, I would not have any confidence in my answer.

1. 👍 1
2. 👎 0

## Similar Questions

1. ### Algebra

A college football coach wants to know if the is a correlation between his players' leg strength and the time it takes for them to sprint 40 yards. he sets up the following test and records the data: Every day for a week, he

asked by Anonymous on November 17, 2015
2. ### math

the stem-and-leaf plot shows the height, in inches, of the players on two different basketball teams. How many players on each team are less than 70 inches tall? Heights of Players In inches Austin College Barton College Leaf Stem

asked by Bella on May 31, 2017
3. ### math

A team has twelve 15-year-old players and eight 16-year-old players. The coach of the team is 43 years old. Which measure of central tendency best represents the ages of the team, including the coah, and why? A: Mean, because it

asked by Jammin on March 28, 2011
4. ### Math

Coach Jericho recorded the number of shots made by the starters on the 6th grade and 8th grade boys’ basketball team during the season. 6th Grade 22, 15, 17, 18, 20 8th 58, 58, 52, 55, 53 Which statement is true? Select two

asked by Bonnie on March 18, 2020
5. ### ALGEBRA

A baseball team has 13 players; how many possible batting orders can the coach make if there are 9 players in the batting lineup?Hello can you help with this problem i try different ways to solve it but it is not match with my

asked by Sam on November 16, 2016
1. ### English

R for run on sentence, CS for comma splice, F for fragment, and C for correct sentence. Some correct sentences can be punctuated more effectively, however. 1. Carlos took the job and he was happy to get it. 2. Tono loves Chinese

asked by Jess on November 7, 2009
2. ### math

A line of best fit can be established with which of the following? Select all that apply. positive correlation all scatter plots random correlation no correlation negative correlation

asked by kyle on October 8, 2019
3. ### Algebra 9th

24. Correlation -0.015 How confident can you be? I'm confident in -0.015 because it's closer to 0 than anything else, therefore has no correlation. 25. 25. A college football coach wants to know if there is a correlation between

asked by bleh on December 19, 2016
4. ### Algebra

10. Write an equation in point-slope form for the line through the given point with the given slope. (5, 2); m=3 a. y+2=3(x-5) *** b. y+2=3x-5 c. y-2=3(x+5) d.y-2=3(x-5) 11. Write an equation in point-slope form for the line

asked by bleh on December 19, 2016
5. ### Physics

A football coach sits on a sled while two of his players build their strength by dragging the sled across the field with ropes. The friction force on the sled is 800 N and the angle between the two ropes is 20°. How hard must

asked by Sasha on November 19, 2009
6. ### Sport Strategies ~ Football

The sport of Association football is quite different from football in American culture. In the statements provided, select the one in which association football and american football are not similar. a. having players wear cleated

asked by Jenny on February 12, 2014