An endocrinologist was interested in exploring the relationship between the level of a steroid (y) and age (x) in healthy subjects whose ages ranged from 8 to 25 years. she collected a sample of 27 healthy subject in this age range. the data is located in the file problem01.txt, where the first column represents x = age and the second column represents y = steroid level. for all r programming, print input and output codes and values, data to be used is below.

(create a quadratic regression in r. write down the fitted equation, multiple r2, and the p-value for β1 from the summary()output.

yi =β0 + β1xi + β2xi2 + εi

answer:

total cost for tiles and paints is $924.  

step-by-step explanation:

we have been given that a community hall is in the shape of a cuboid. the hall is 40m long 15m high and 3m wide.

the paint will be required for 4 walls and ceiling.

let us find area of walls and ceiling.

therefore, the area of walls and ceiling is 1410 square meters.

given: cost for 10 litre of paint is $10 and 10 litre paint covers 25 square meter. therefore,

therefore, the total painting cost is $564.

tiles will be required for floor. let us find the area of floor.

given: 1m squared floor tiles costs $3. so,

therefore, the total tiles cost is $360.

now let us find combined total cost of tiles and paint.

therefore, the combined total cost of tiles and paint is $924.

answer is b

step-by-step explanation:

df =

both have same length

where does the z at is it on the x axes or on the y axes any way if it is on the y axes put it horizontally and if it is on the x axes put it vertically