In a survey of 480 students, 253 indicated that play the piano, 268 indicated that they play the harp and 73 indicated they play the piano and the harp. 1. how many students surveyed play the harp only?

195

Step-by-step explanation:

To find many play the harp only, we need to get the number of students that said they play the harp.

268 play the harp

73 play the harp and piano

Now since we're only looking for the students that only play the harp, we subtract the number of students who play the harp and piano to the students who play the harp alone.

268 - 73 = 195

So 195 Students play the harp.

a. the residual plot for model 1 has a random pattern and is a good fit for the data.

square root of 36/6 = 2.449489743

square root of 16/6 = 1.632993162

square root of 6 = 2.449489743

the answer is square root of 16/6 because the square root of 36/6 is the same answer as square root of 6 = 2.449489743