Mathematics, 21.04.2020 17:24 Crxymia

7.28 Helmets and lunches. The scatterplot shows the relationship between socioeconomic status measured as the percentage of children in a neighborhood receiving reduced-fee lunches at school (lunch) and the percentage of bike riders in the neighborhood wearing helmets (helmet). The average percentage of children receiving reduced-fee lunches is 30.8% with a standard deviation of 26.7% and the average percentage of bike riders wearing helmets is 38.8% with a standard deviation of 16.9%. (a) If the R 2 for the least-squares regression line for these data is 72%, what is the correlation between lunch and helmet

Answers: 2

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 16:50

The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60

Answers: 1

Answer

Mathematics, 21.06.2019 19:00

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu

Answers: 1

Answer

Mathematics, 21.06.2019 21:20

Se tiene en una caja de canicas 10, 4 blancas y 6 negras ¿cual es la probabilidad que en 2 extracciones con reemplazo sean blancas? ¿cual es la probalidad que en 2 extracciones sin reemplazo sean negras?

Answers: 1

Answer

Mathematics, 21.06.2019 21:20

52 cm radius = diameter = area = circumference = circumfer

Answers: 1

Answer

You know the right answer?

7.28 Helmets and lunches. The scatterplot shows the relationship between socioeconomic status measur...

Questions

Mathematics, 30.01.2020 23:53

The number of seats in each row of a theater forms an arithmetic sequence. the fifth row contains 22 seats. the tenth row contains 37 seats . how many...

Mathematics, 30.01.2020 23:53