Amultiple regression model was used to relate y=viscosity of a chemical product to x1=temperature and x2=reaction time. the data set consisted of n = 15 observations.

(a) the estimated regression coefficients were ˆ β0 = 300.00, ˆ β1 = 0.85, and ˆ β2 = 10.40. calculate an estimate of mean viscosity when x1 = 100of and x2 = 3 hours.
(b) the sums of squares were sst=1230.50 and sse=120.30. test for significance of regression using α = 0.05. what conclusion can you draw?
(c) what proportion of total variability in viscosity is accounted for by the variables in this model?
(d) suppose that another regressor, x3=stirring rate, is added to the model. the new value of the error sum of squares is sse=117.20. has adding the new variable resulted in a smaller value of mse? discuss the significance of this result.
(e) calculate the f-statistic to assess the contribution of x3 to the model. using α = 0.05, what conclusion do you reach?

the correct answer is a) they believe they have a "just cause."

islamic terrorists justify their violent actions because they believe they have a "just cause."

every act of terrorism of islamic sects is done “in the name of allah”. that justifies their actions. islam people who commit those terrorist attacks are not afraid to die. that is why the attacks have horrible consequences. they know they are going to die and they are proud to do it because it is in the name of allah, so it is justified and is for a “good cause.”

since the very beginning of the conflict with israel, islam is fighting a “sacred war”, respecting the words stated in the qur’an. they fight against the domination of the western countries and to defend their occupied territories.

which would be true for stem changing verbs?

they have a consistent spelling change in the stem of the verb.

what is different about the verb “venir” as compared to other stem-changing verbs?

only the third person forms have a stem change.

which of the following could not be considered a “stem-changing” verb?

querer

which of the following would not be condsidered an event?

desfile

what word could be used in response to the following?

¿qué quieres comprar?

quero

what word could be used in response to the following?

¿dónde uds. pueden ir?

vamos  

ellos ir al centro comercial.

yo comprar un vestido.

pedimos

dónde tú?

dormes

step-by-step explanation:

b is the correct answer