Observed and predicted values of a variable y based on a sample of size n=9 and a forecasting model are given below. compute sample mean, sample variance for y. compute mse and mad for residuals. y 10.2 15 16.1 15.3 17 18.3 19.4 20.1 24 y 79.5 15.5 15 16 17.7 18 20 22 21

Step-by-step explanation:

The sample mean for a finite set of values is given by:

The standard deviation for a finite set of values is given by:

The MAD for a set of predicted values is given by:

The MSE for a set of predicted values is given by:

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.